Early years

Massú is Jewish,^[4][5] as is his mother, Sonia Fried.^[4][6] His father, Manuel Massú, is of Lebanese^[7][8] and Palestinian^[9][10] ancestry. His mother is of Israeli and Hungarian-Jewish descent. His maternal grandfather, Ladislao Fried Klein, was a Hungarian-born Jew who survived the Nazi occupation of Hungary by hiding, as his parents did not survive.^[11] His maternal grandmother, Veronika (née Vegvari), was a Holocaust survivor who was imprisoned in the Auschwitz concentration camp.^[11]

Massú was introduced to tennis by his grandfather at age five. From age 12, he was trained at the Valle Dorado tennis academy, near Villa Alemana, by Leonardo Zuleta, with whom he perfected his forehand and double-handed backhand. He later trained at the Nick Bollettieri Academy, in Florida, alongside Marcelo Ríos, and later at the High Performance Center in Barcelona, Spain.

Juniors

Massú became a professional tennis player in 1997. That year, he won the prestigious juniors year-end Orange Bowl tournament and was doubles world champion, as well as No. 5 in singles.^[12] He also claimed the boys' doubles competitions at both Wimbledon and the US Open, partnering Peru's Luis Horna^[13] at the former and countryman Fernando González at the latter.

ATP Tour

In August 1998, Massú won his first Futures tournament, in Spain. The following month, he claimed his first Challenger event, in Ecuador. He won his second Challenger tournament in June 1999, in Italy. In September 1999, he successfully defended his title in Ecuador. In November 1999, he won the Santiago Challenger event and cracked the top 100 in singles for the first time.^[14]

In May 2000, Massú reached his first ATP tournament final, at the U.S. Clay Court Championships in Orlando, Florida, where he lost to Fernando González. Later in August, he lost again to another Chilean—Marcelo Ríos—in his US Open debut. In January 2001, Massú reached his second ATP event final, in Adelaide, Australia.^[14]

Massú's first ATP title came in February 2002 in Buenos Aires, where he defeated Argentine Agustín Calleri in a three-set final, after being down match point. At the 2003 event, Calleri took revenge and defeated him in the first round, a loss that pushed Massú out of the top 100 in singles and forced him to play Challengers once again. In April 2003, he reached the Bermuda Challenger final.^[14]

Massú claimed his second ATP title in July 2003 in Amersfoort, Netherlands. The following week, he reached the final of the Kitzbühel tournament, cracking the top 50 in singles for the first time. In September, he made three consecutive tournament finals, including a win at a Challenger event and his third ATP title in Palermo. In October, he reached the final at the Madrid Masters Series tournament, losing to Juan Carlos Ferrero in the final. He ended the year at world No. 12.^[14]

In mid-2004, Massú parted ways with Argentine coach Gabriel Markus, whom he replaced with Chilean Patricio Rodríguez. In July 2004, Massú won his fourth ATP title in Kitzbühel and then went on to win two gold medals at the 2004 Olympics (see below). Thanks to his outstanding performance at the Olympics, he reached his career-high ATP singles ranking of world No. 9. In November, he underwent groin surgery and therefore entered the 2005 season off top form. He ended an unremarkable 2005 with a six-match losing streak, although ironically 2005 also saw his best performance at a Grand Slam tournament as he reached the fourth round of the US Open, losing to Guillermo Coria.^[14]

He was the first player to be beaten by Stan Wawrinka in the main draw of a Grand Slam tournament, at the 2005 French Open.^[15][16]

In January 2006, Massú lost to José Acasuso in the final of his hometown event at Viña del Mar. In February, he won his sixth ATP title in Costa do Sauipe, Brazil. In April, he reached the final of the Casablanca event in Morocco. In July, he lost to Novak Djokovic in the final of the Amersfoort tournament.^[14]

In January 2007, Massú repeated his Viña del Mar showing of 2006, losing to Luis Horna in straight sets. In July, he began an eight-match losing streak that ended in October in Saint Petersburg.

Massú had an early exit at the Viña del Mar tournament in January 2008, losing to Sergio Roitman in the first round. Because he was defending points from a final showing in 2007, the following week he fell to No. 97 in the world. In July, his singles ranking plummeted to No. 138, his worst since November 1999. Later in the year, he won the Florianópolis II Challenger event and was a finalist in two other tournaments at that level.^[14]

Massú began 2009 by not winning a match during his first five tournaments and losing his opening Davis Cup singles match against Croatia in March. He broke his losing streak at the Indian Wells Masters, beating Argentine Eduardo Schwank in three sets in the first round.^[14]

Olympics

Massú has represented Chile at three Summer Olympics: 2000 Sydney, 2004 Athens and 2008 Beijing. At the 2000 event's opening ceremony, he was his country's stand in flag bearer after Marcelo Ríos failed to show up. In his first-round match he beat Sláva Doseděl, but lost to Juan Carlos Ferrero in the next round.

The story was different in Athens, where Massú captured both singles and doubles titles. On August 21, he and Fernando González defeated Nicolas Kiefer and Rainer Schüttler of Germany to win the doubles competition, making history by giving Chile its first ever Olympic gold medal in any sport, after nearly a full century of Olympic participation. Massú and González came from four straight match points in the fourth set tie-break to claim the gold. The following day, he captured his second gold medal by defeating American Mardy Fish in five sets in the men's singles final. Following his victory in singles, he was declared as Athlete of the Day by the 2004 Athens Olympics' organization.^[17]

"I was so happy because this is my best memory in my sport career. If I look back in 10 more years, I look back on this, I'm gonna be so happy. Now I can die happy."^[4]

Because of his low ranking, Massú was granted a wild card to compete in both singles and doubles events in Beijing.^[18] He only managed to reach the second round in singles and was ousted on his first match in doubles, where he partnered again with Fernando González. To this day, Massú is the only male player in the Open Era to have won gold medals in both singles and doubles at the same Olympic Games.

Davis Cup

Massú began playing for Chile in Davis Cup matches in 1996. He played in the World Group, representing Chile in the years from 2005 to 2007 and again from 2009 to 2011. He ended his participation with a record of 29–17, including 17–4 on clay.^[19]

In 2014, Massú took the position of captain of the Chile Davis Cup team,^[20] with former No. 1 Marcelo Ríos as coach. After five years since the start of his tenure as captain, the team achieved a comeback to the elite group of the competition and qualified for the 2019 Davis Cup Finals, eight years after its last participation.

Maccabiah Games

Massú is a veteran of the 2001 Maccabiah Games in Israel, the international Jewish Olympics.^[21]

Olympic finals

Singles: 1 (1–0)

More information Outcome, Year ...

Outcome	Year	Championship	Surface	Opponent	Score
Gold	2004	Athens Olympics	Hard	Mardy Fish	6–3, 3–6, 2–6, 6–3, 6–4

Close

Doubles: 1 (1–0)

More information Outcome, Year ...

Outcome	Year	Championship	Surface	Partner	Opponents	Score
Gold	2004	Athens Olympics	Hard	Fernando González	Nicolas Kiefer Rainer Schüttler	6–2, 4–6, 3–6, 7–6(9–7), 6–4

Close

Masters Series finals

Singles: 1 (0–1)

More information Outcome, Year ...

Outcome	Year	Championship	Surface	Opponent	Score
Runner-up	2003	Madrid	Hard (i)	Juan Carlos Ferrero	3–6, 4–6, 3–6

Close

Singles: 15 (6 titles, 9 runner-ups)

More information Result, W/L ...

Result	W/L	Date	Tournament	Surface	Opponent	Score
Loss	0–1	May 2000	Orlando, United States	Clay	Fernando González	2–6, 3–6
Loss	0–2	Jan 2001	Adelaide, Australia	Hard	Tommy Haas	3–6, 1–6
Win	1–2	Feb 2002	Buenos Aires, Argentina	Clay	Agustín Calleri	2–6, 7–6(7–5), 6–2
Win	2–2	Jul 2003	Amersfoort, Netherlands	Clay	Raemon Sluiter	6–4, 7–6(7–3), 6–2
Loss	2–3	Jul 2003	Kitzbühel, Austria	Clay	Guillermo Coria	1–6, 4–6, 2–6
Loss	2–4	Sep 2003	Bucharest, Romania	Clay	David Sánchez	2–6, 2–6
Win	3–4	Sep 2003	Palermo, Italy	Clay	Paul-Henri Mathieu	1–6, 6–2, 7–6(7–0)
Loss	3–5	Oct 2003	Madrid, Spain	Hard (i)	Juan Carlos Ferrero	3–6, 4–6, 3–6
Win	4–5	Jul 2004	Kitzbühel, Austria	Clay	Gastón Gaudio	7–6(7–3), 6–4
Win	5–5	Aug 2004	Athens Olympics	Hard	Mardy Fish	6–3, 3–6, 2–6, 6–3, 6–4
Loss	5–6	Feb 2006	Viña del Mar, Chile	Clay	José Acasuso	4–6, 3–6
Win	6–6	Feb 2006	Costa do Sauípe, Brazil	Clay	Alberto Martín	6–3, 6–4
Loss	6–7	Apr 2006	Casablanca, Morocco	Clay	Daniele Bracciali	1–6, 4–6
Loss	6–8	Jul 2006	Amersfoort, Netherlands	Clay	Novak Djokovic	6–7(5–7), 4–6
Loss	6–9	Feb 2007	Viña del Mar, Chile	Clay	Luis Horna	5–7, 3–6

Close

Doubles: 3 (1 title, 2 runner-ups)

More information Result, No. ...

Result	No.	Date	Championship	Surface	Partner	Opponents	Score
Loss	1.	Mar 2004	Acapulco, Mexico	Clay	Juan Ignacio Chela	Bob Bryan Mike Bryan	2–6, 3–6
Win	1.	Aug 2004	Athens Olympics	Hard	Fernando González	Nicolas Kiefer Rainer Schüttler	6–2, 4–6, 3–6, 7–6(9–7), 6–4
Loss	2.	Jul 2005	Amersfoort, Netherlands	Clay	Fernando González	Martín García Luis Horna	4–6, 4–6

Close

Singles: 18 (10–8)

More information Outcome, No. ...

Outcome	No.	Date	Tournament	Surface	Opponent	Score
Runner-up	1.	May 24, 1998	Vero Beach, Florida, USA	Clay	Ronald Agénor	3–6, 6–3, 3–6
Runner-up	2.	May 31, 1998	Boca Raton, USA	Clay	Ronald Agénor	1–6, 2–6
Runner-up	3.	June 21, 1998	Lafayette, USA	Hard	Cecil Mamiit	6–0, 3–6, 0–6
Winner	1.	August 23, 1998	Vigo, Spain	Clay	Tommy Robredo	6–4, 6–2
Winner	2.	August 30, 1998	Irun, Spain	Clay	Maxime Boyé	6–4, 3–6, 6–3
Winner	3.	September 7, 1998	Quito, Ecuador	Clay	Mariano Sánchez	3–6, 6–3, 6–0
Winner	4.	June 21, 1999	Biella, Italy	Clay	Oleg Ogorodov	7–6(7–5), 5–7, 6–3
Winner	5.	September 6, 1999	Quito, Ecuador	Clay	Luis Morejón	6–2, 3–6, 6–3
Winner	6.	November 1, 1999	Santiago, Chile	Clay	Karim Alami	6–7(4–7), 6–2, 6–4
Runner-up	4.	November 28, 1999	Guadalajara, Mexico	Clay	Francisco Costa	6–4, 5–7, 3–6
Winner	7.	September 15, 2003	Szczecin, Poland	Clay	Albert Portas	6–4, 6–3
Runner-up	5.	April 14, 2003	Paget, Bermuda	Clay	Flávio Saretta	1–6, 4–6
Winner	8.	May 5, 2008	Rijeka, Croatia	Clay	Christophe Rochus	6–2, 6–2
Runner-up	6.	August 3, 2008	Belo Horizonte, Brazil	Hard	Santiago González	4–6, 3–6
Winner	9.	October 6, 2008	Florianópolis, Brazil	Clay	Olivier Patience	6–7(4–7), 6–2, 6–1
Runner-up	8.	October 13, 2008	Montevideo, Uruguay	Clay	Peter Luczak	w/o
Runner-up	8.	October 23, 2009	Santiago, Chile	Clay	Eduardo Schwank	2–6, 2–6
Winner	10.	November 22, 2009	Cancún, Mexico	Clay	Grega Zemlja	6–3, 7–5

Close

Singles

Doubles

¹Held as Hamburg Masters until 2008 and Madrid Masters from 2009 to 2013.
²Held as Stuttgart Masters until 2001, Madrid Masters from 2002 to 2008 and Shanghai Masters from 2009 to 2013.