Juniors

Muster first came to prominence when he reached the final of the French Open junior tournament and the Orange Bowl juniors tournament in 1985.

Pro tour

Muster played his first matches at the top-level in 1984, as a junior player, at the age of 16. In 1984, he played his first match for Austria in the Davis Cup. He also played at the 1984 Summer Olympics in Los Angeles, and in two tournaments on Austrian soil, the clay-court event in Kitzbühel and the indoor carpet event in Vienna.

Muster turned professional in 1985, regularly playing in Challenger tournaments throughout the year, winning in Belo Horizonte, as well as continuing to play in many top-level tournaments. Muster won his first top-level tournament at the Dutch Open in Hilversum in 1986.

In 1988, Muster reached six top-level tournament finals, winning four of them, in Boston, Bordeaux, Prague and Bari. Muster finished the year ranked 16th in the world.

Early in 1989, he became the first Austrian to reach the semifinals of the Australian Open, eventually losing in four sets to world No. 1, Ivan Lendl. Shortly after that, he became the first Austrian to reach the world top 10. On the night of 31 March 1989, he defeated Yannick Noah in five sets in the semifinals of the Lipton International Players Championships in Key Biscayne, Florida, to set up a final against Lendl. However, in the early hours of 1 April 1989, just hours after his semifinal victory, he was struck by a drunk driver, severing ligaments in his left knee and forcing him to default the final. Muster flew back to Vienna to undergo surgery. With the aid of a special chair designed to allow him to practice hitting balls while recovering from knee surgery, he returned to competitive tennis in September 1989.^[2]

Muster's comeback continued in 1990, when he won three top-level tournaments on clay (including the Italian Open, defeating Andrés Gómez in the semifinals and Andrei Chesnokov in the final) and one title on hardcourt. Muster reached the semifinals of the 1990 French Open, losing in straight sets to the eventual champion, Andrés Gómez. He also helped Austria reach the semifinals of the Davis Cup, where they were eliminated 3–2 by the United States, despite winning both of his singles rubbers against Michael Chang and Andre Agassi. That year, he was named the ATP Tour's "Comeback Player of the Year."

In 1990, Muster won the Austrian Sportsman of the Year award.^[3] He won two more top-level tournaments in 1991, and three more in 1992 (all on clay courts), with the biggest of these titles being the 1992 Monte Carlo title, where he defeated Aaron Krickstein in the final. In 1993, Muster won seven titles. Muster's win–loss record on clay in 1993 was 55–10, although he failed to win any of the four big clay-court events of the year.

At both the 1992 and 1993 French Opens, Muster was defeated by the reigning French Open and Australian Open champion Jim Courier. At the 1994 French Open, he won his second round match against Andre Agassi in five sets but was then defeated by the serve-and-volley play of Patrick Rafter in the next round, with Rafter's four set victory denying Muster a match against the reigning French Open champion Sergi Bruguera.

Muster won three clay-court titles in 1994. In March 1994, he defeated Michael Stich of Germany in a first round Davis Cup tie in Graz, 6–4, 6–7, 4–6, 6–3, 12–10, after saving a match point when trailing at 7–8 in the fifth set. Despite Muster's win over Stich bringing Austria level at 2–2 in the tie, it was Germany who eventually won the decisive fifth rubber.^[4]

In 1995, Muster enjoyed the best year of his career winning 12 tournaments, with 11 of those tournaments won on clay-courts. Between February and June 1995, Muster won 40 consecutive matches on clay (the longest winning streak on the surface since Björn Borg had won 46 matches between 1977 and 1979). At the 1995 Monte Carlo Masters, he defeated Andrea Gaudenzi in the semifinals, despite struggling heavily in the latter stages of the match due to having a shortage of glucose in his blood and suffering a 40° fever, which required a brief spell in hospital after the match. The next day, he won the final against Boris Becker, after a tough match, by 4–6, 5–7, 6–1, 7–6, 6–0, with Muster surviving two championship points in the fourth set tiebreak, the first of which saw Becker double-faulting after going for a big second serve. He went on to win his second Italian Open title, defeating Sergi Bruguera in the final. At the 1995 French Open, Muster won his first and only Grand Slam singles title, defeating Yevgeny Kafelnikov in the semifinals and comfortably beating 1989 champion Michael Chang in the final. Muster was the only Austrian to win a Grand Slam singles title until Dominic Thiem won the 2020 US Open. His win–loss record on clay in 1995 was a remarkable 65–2. Although his record on other surfaces was less impressive, a late season victory over Pete Sampras on fast indoor carpet during his run to the title of the 1995 Eurocard Open (October) – Singles Masters event in Essen, Germany, gave Muster an outside chance at finishing the year no. 1; however, Sampras finished the year at no. 1. Of the 12 tournaments that Muster won in 1995, he saved at least one match point held against him during six of them, with those six tournaments being held in Estoril, Barcelona, Monte Carlo, St. Pölten, Stuttgart Outdoor and Umag.

In 1995, Muster won the Austrian Sportsman of the Year award for the second time.^[3] He continued to rack up clay-court victories in 1996. He won seven tournaments, six of them titles he successfully defended after winning them the year before. These 1996 tournament victories included his third Monte Carlo title, where he defeated clay court specialist Albert Costa in the final, and his third Italian Open title, defeating Richard Krajicek in the final. Muster's win–loss record on clay in 1996 was an impressive 46–3. This made his 1995–96 record on the surface 111–5, which was, at the time, the best two-year clay-court record since the open era began in 1968. Despite Muster's continued dominance on clay-courts in 1996, he was upset in the Round of 16 at the 1996 French Open, losing to eventual finalist Michael Stich in four sets. In July 1996, in the final of the 1996 Mercedes Cup in Stuttgart, Muster defeated newly crowned French Open champion Yevgeny Kafelnikov in three straight sets.

In February 1996, Muster attained the world no. 1 ranking for the first time. He held the ranking initially for just one week, and then regained it for five weeks over March and April 1996. The validity of Muster's number one ranking was called into question by top Americans Pete Sampras and Andre Agassi, who argued that he had achieved the top spot based almost solely on his clay court results, although Muster had beaten Sampras on indoor carpet at the 1995 Masters event in Essen, Germany, and Agassi had only won tournaments on hardcourt in 1995.

In 1997, Muster enjoyed the best results of his career on hardcourt. He reached the semifinals of the 1997 Australian Open, losing to eventual champion Pete Sampras. He then went on to win the tournament in Dubai, defeating Goran Ivanišević in the final. Following a semifinal showing at the 1997 Newsweek Champions Cup and the State Farm Evert Cup in Indian Wells, California, Muster won his biggest title on hardcourt at the 1997 Miami Masters, the same tournament where his career had nearly ended eight years earlier. After a semifinal victory over Jim Courier—his third successive win over the American in early 1997—Muster defeated Sergi Bruguera in three straight sets in the final. Bruguera had defeated Sampras in the semifinals.

In August 1997, Muster made a hard-fought run to the championship round of the Cincinnati Masters before losing the final to Sampras. Having reached the semifinals or better in four of the five most important hard court events of the season to date, Muster was one of the favorites at the 1997 US Open – Men's singles. However, as the fifth seed, Muster received a difficult first round draw and fell in four sets to Great Britain's Tim Henman, then ranked world no. 21. Muster played decently indoors during the fall of 1997, reaching the semifinals of the 1997 IPB Czech Indoor in Ostrava, Czech Republic, and the quarterfinals of the 1997 Paris Open. As an injury-replacement alternate, the Austrian made his fourth and final appearance in the ATP's year-end tournament, the 1997 ATP Tour World Championships – Singles, losing his lone match to Carlos Moyá. Muster finished 1997 ranked world no. 9.

For the season, Muster achieved a 29–8 win–loss record on hardcourt, but he only won nine out of 18 matches on clay. Muster's 1997 French Open campaign ended in the third round when unseeded Gustavo Kuerten, then ranked at 66 in the world, defeated him in five sets despite Muster holding a 3–0 lead in the fifth set. Kuerten went on to win the 1997 French Open title and usher in a new era on clay.

With a renewed focus on clay and the 1998 French Open, Muster enjoyed a better April and May than he had the year prior. A strong run to the semifinals on the hard courts of Indian Wells—where he beat top-ranked Sampras along the way—in March 1998 buoyed Muster onto the European clay. In his next event and first clay appearance of 1998, Muster reached the last top-level tournament final of his career in Estoril, losing to Alberto Berasategui in three sets.

In early May 1998, Muster defeated sixth-ranked Yevgeny Kafelnikov en route to the quarterfinals of the 1998 ATP German Open in Hamburg, Germany. At the 1998 French Open, Muster scored several nice wins to reach the quarterfinals before losing to Félix Mantilla in four sets, with Mantilla getting revenge for his contentious 1998 Italian Open defeat to Muster a few weeks prior.

Muster's 1998 results faded after the spring, and he reached just one semifinal (Mallorca) and one quarterfinal (Boston) for the remainder of the year. Muster opened 1999 with a semifinal showing in Sydney before struggling over the next few months, winning just two of his 12 matches after Sydney. Following his first-round loss to Nicolás Lapentti at the 1999 French Open, Muster quietly disappeared from the ATP Tour at the age of 31. Muster remains the only world no. 1 singles player who never managed to win a men's singles match at Wimbledon throughout his whole career (only made four appearances).

Muster only lost one Davis Cup singles match on clay in his career, when Goran Ivanišević defeated him in April 1997, 6–7, 7–5, 6–7, 6–2, 7–5, despite Muster having won 112 of his previous 117 matches on clay going into the match. Muster's overall Davis Cup win–loss record, counting both singles and doubles matches, was 45–18. Muster's win–loss record in Davis Cup singles matches was 36–8, while his win–loss record in Davis Cup singles matches on clay was 29–1. Muster has more match wins in Davis Cup than any other Austrian tennis player.

After he stopped playing tennis after the 1999 French Open, Muster moved to Noosa Heads, Australia, where he had officially resided since 1996, and married television presenter Jo Beth Taylor in 2000. The couple have a son, Christian, who was born in 2001. Muster and Taylor separated in 2002 and divorced in 2005.^[5] In 2003, Muster moved back to Austria, to work as a coach and captain of the Austrian Davis Cup team. He has played tennis on the ATP Champions Tour. In April 2010, Muster married Caroline Ofner, and they have a daughter, Maxim, who was born in 2009.^[6]

On 16 June 2010, at the age of 42, Muster announced his comeback to professional tennis. In July 2010, he played the first match of his comeback in a Challenger tournament in Braunschweig, where he lost in the first round. He went on to play in three Challenger tournaments in Kitzbühel, Como, and Rijeka. Eventually, in his fifth Challenger tournament in Ljubljana, Muster won his first comeback match, against Borut Puc of Croatia, which brought Muster back into the ATP singles ranking list at world number 988. Muster finished 2010 ranked at world number 980.

On 13 September 2011, Muster won a second match after his comeback, in the Todi Challenger, against the fifth seeded Argentinian Leonardo Mayer. His next opponent was countryman Martin Fischer, to whom Muster lost. On 19 September 2011, Muster reached world No. 847. He then lost his next match, at the Challenger tournament in Palermo, to Alessio di Mauro.

In October 2011, at the age of 44, Muster decided that he would play his last tennis match before retirement at the top-level Vienna tournament, where Muster lost to countryman, Dominic Thiem, in straight sets.^[7] However, three weeks after playing in Vienna, Muster was back again, this time in a Challenger tournament in Salzburg, playing against Dennis Blömke. He lost a close three-set battle. This was his last match to date.

Grand Slam finals

Singles: 1 (1 title)

More information Result, Year ...

Result	Year	Championship	Surface	Opponent	Score
Win	1995	French Open	Clay	Michael Chang	7–5, 6–2, 6–4

Close

Masters Series finals

Singles: 10 (8 titles, 2 runner-ups)

More information Result, Year ...

Result	Year	Tournament	Surface	Opponent	Score
Loss	1990	Monte Carlo	Clay	Andrei Chesnokov	5–7, 3–6, 3–6
Win	1990	Rome	Clay	Andrei Chesnokov	6–1, 6–3, 6–1
Win	1992	Monte Carlo	Clay	Aaron Krickstein	6–3, 6–1, 6–3
Win	1995	Monte Carlo (2)	Clay	Boris Becker	4–6, 5–7, 6–1, 7–6(8–6), 6–0
Win	1995	Rome (2)	Clay	Sergi Bruguera	3–6, 7–6(7–5), 6–2, 6–3
Win	1995	Essen	Carpet (i)	MaliVai Washington	7–6(8–6), 2–6, 6–3, 6–4
Win	1996	Monte Carlo (3)	Clay	Albert Costa	6–3, 5–7, 4–6, 6–3, 6–2
Win	1996	Rome (3)	Clay	Richard Krajicek	6–2, 6–4, 3–6, 6–3
Win	1997	Miami	Hard	Sergi Bruguera	7–6(8–6), 6–3, 6–1
Loss	1997	Cincinnati	Hard	Pete Sampras	3–6, 4–6

Close

Singles: 55 (44 titles, 11 runner-ups)

More information Result, No. ...

Result	No.	Date	Tournament	Surface	Opponent	Score
Win	1.	Aug 1986	Hilversum, Netherlands	Clay	Jakob Hlasek	6–1, 6–3, 6–3
Win	2.	Jul 1988	Boston, US	Clay	Lawson Duncan	6–2, 6–2
Win	3.	Jul 1988	Bordeaux, France	Clay	Ronald Agénor	6–3, 6–3
Win	4.	Aug 1988	Prague, Czechoslovakia	Clay	Guillermo Pérez Roldán	6–4, 5–7, 6–2
Loss	1.	Sep 1988	Barcelona, Spain	Clay	Kent Carlsson	3–6, 3–6, 6–3, 1–6
Win	5.	Sep 1988	Bari, Italy	Clay	Marcelo Filippini	2–6, 6–1, 7–5
Loss	2.	Oct 1988	Vienna, Austria	Carpet (i)	Horst Skoff	6–4, 3–6, 4–6, 2–6
Loss	3.	Apr 1989	Miami, US	Hard	Ivan Lendl	w/o
Win	6.	Jan 1990	Adelaide, Australia	Hard	Jimmy Arias	3–6, 6–2, 7–5
Win	7.	Mar 1990	Casablanca, Morocco	Clay	Guillermo Pérez Roldán	6–1, 6–7(6–8), 6–2
Loss	4.	Apr 1990	Monte Carlo, Monaco	Clay	Andrei Chesnokov	5–7, 3–6, 3–6
Loss	5.	May 1990	Munich, West Germany	Clay	Karel Nováček	4–6, 2–6
Win	8.	May 1990	Rome, Italy	Clay	Andrei Chesnokov	6–1, 6–3, 6–1
Win	9.	Jun 1991	Florence, Italy	Clay	Horst Skoff	6–2, 6–7(2–7), 6–2
Win	10.	Sep 1991	Geneva, Switzerland	Clay	Horst Skoff	6–2, 6–4
Win	11.	Apr 1992	Monte Carlo, Monaco	Clay	Aaron Krickstein	6–3, 6–1, 6–3
Win	12.	Jun 1992	Florence, Italy	Clay	Renzo Furlan	6–3, 1–6, 6–1
Win	13.	Aug 1992	Umag, Croatia	Clay	Franco Davín	6–1, 4–6, 6–4
Loss	6.	Jan 1993	Sydney, Australia	Hard	Pete Sampras	6–7(7–9), 1–6
Win	14.	Feb 1993	Mexico City, Mexico	Clay	Carlos Costa	6–2, 6–4
Win	15.	Jun 1993	Florence, Italy	Clay	Jordi Burillo	6–1, 7–5
Win	16.	Jun 1993	Genoa, Italy	Clay	Magnus Gustafsson	7–6(7–3), 6–4
Win	17.	Aug 1993	Kitzbühel, Austria	Clay	Javier Sánchez	6–3, 7–5, 6–4
Win	18.	Aug 1993	San Marino, San Marino	Clay	Renzo Furlan	7–5, 7–5
Win	19.	Aug 1993	Umag, Croatia	Clay	Alberto Berasategui	7–5, 3–6, 6–3
Win	20.	Oct 1993	Palermo, Italy	Clay	Sergi Bruguera	7–6(7–2), 7–5
Loss	7.	Oct 1993	Vienna, Austria	Carpet (i)	Goran Ivanišević	6–4, 4–6, 4–6, 6–7(3–7)
Win	21.	Feb 1994	Mexico City, Mexico	Clay	Roberto Jabali	6–3, 6–1
Win	22.	May 1994	Madrid, Spain	Clay	Sergi Bruguera	6–2, 3–6, 6–4, 7–5
Win	23.	Jun 1994	Sankt Pölten, Austria	Clay	Tomás Carbonell	4–6, 6–2, 6–4
Win	24.	Mar 1995	Mexico City, Mexico	Clay	Fernando Meligeni	7–6(7–4), 7–5
Win	25.	Apr 1995	Estoril, Portugal	Clay	Albert Costa	6–4, 6–2
Win	26.	Apr 1995	Barcelona, Spain	Clay	Magnus Larsson	6–2, 6–1, 6–4
Win	27.	Apr 1995	Monte Carlo, Monaco	Clay	Boris Becker	4–6, 5–7, 6–1, 7–6(8–6), 6–0
Win	28.	May 1995	Rome, Italy	Clay	Sergi Bruguera	3–6, 7–6(7–5), 6–2, 6–3
Win	29.	Jun 1995	French Open	Clay	Michael Chang	7–5, 6–2, 6–4
Win	30.	Jun 1995	Sankt Pölten, Austria	Clay	Bohdan Ulihrach	6–3, 3–6, 6–1
Win	31.	Jul 1995	Stuttgart, Germany	Clay	Jan Apell	6–2, 6–2
Loss	8.	Aug 1995	Kitzbühel, Austria	Clay	Albert Costa	6–4, 4–6, 6–7(3–7), 6–2, 4–6
Win	32.	Aug 1995	San Marino, San Marino	Clay	Andrea Gaudenzi	6–2, 6–0
Win	33.	Aug 1995	Umag, Croatia	Clay	Carlos Costa	3–6, 7–6(7–5), 6–4
Win	34.	Sep 1995	Bucharest, Romania	Clay	Gilbert Schaller	6–3, 6–4
Loss	9.	Oct 1995	Vienna, Austria	Carpet (i)	Filip Dewulf	5–7, 2–6, 6–1, 5–7
Win	35.	Oct 1995	Essen, Germany	Carpet (i)	MaliVai Washington	7–6(8–6), 2–6, 6–3, 6–4
Win	36.	Mar 1996	Mexico City, Mexico	Clay	Jiří Novák	7–6(7–3), 6–2
Win	37.	Apr 1996	Estoril, Portugal	Clay	Andrea Gaudenzi	7–6(7–4), 6–4
Win	38.	Apr 1996	Barcelona, Spain	Clay	Marcelo Ríos	6–3, 4–6, 6–4, 6–1
Win	39.	Apr 1996	Monte Carlo, Monaco	Clay	Albert Costa	6–3, 5–7, 4–6, 6–3, 6–2
Win	40.	May 1996	Rome, Italy	Clay	Richard Krajicek	6–2, 6–4, 3–6, 6–3
Win	41.	Jul 1996	Stuttgart, Germany	Clay	Yevgeny Kafelnikov	6–2, 6–2, 6–4
Win	42.	Sep 1996	Bogotá, Colombia	Clay	Nicolás Lapentti	6–7(6–8), 6–2, 6–3
Win	43.	Feb 1997	Dubai, UAE	Hard	Goran Ivanišević	7–5, 7–6(7–3)
Win	44.	Mar 1997	Miami, US	Hard	Sergi Bruguera	7–6(8–6), 6–3, 6–1
Loss	10.	Aug 1997	Cincinnati, US	Hard	Pete Sampras	3–6, 4–6
Loss	11.	Apr 1998	Estoril, Portugal	Clay	Alberto Berasategui	6–3, 1–6, 3–6

Close

Doubles: 2 (1 title, 1 runner-up)

More information Result, No. ...

Result	No.	Date	Tournament	Surface	Partner	Opponents	Score
Loss	1.	Aug 1988	Prague, Czechoslovakia	Clay	Horst Skoff	Petr Korda Jaroslav Navrátil	5–7, 6–7
Win	1.	Sep 1988	Bari, Italy	Clay	Claudio Panatta	Francesco Cancellotti Simone Colombo	6–3, 6–1

Close