Georgios Kalaitzis (also spelled Giorgos; Greek: Γιώργος Καλαϊτζής; born August 29, 1976) is a Greek basketball coach and former professional player, who last served as the youth academy head coach for Panathinaikos of the Greek Basket League and the EuroLeague. During his playing career, at a height of 1.96 m (6'5") tall, Kalaitzis played at the point guard, shooting guard and small forward positions.

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Georgios Kalaitzis
Γιώργος Καλαϊτζής

Personal information
Born	(1976-08-29) August 29, 1976 (age 47) Thessaloniki, Greece
Nationality	Greek
Listed height	6 ft 5 in (1.96 m)
Listed weight	220 lb (100 kg)
Career information
NBA draft	1998: undrafted
Playing career	1994–2014
Position	Guard / small forward
Coaching career	2015–present
Career history
As player:
1994–1997	Panionios
1997	Olimpia Milano
1997–2006	Panathinaikos
2006–2008	Aris
2008–2011	Panellinios
2011–2013	Kolossos Rodou
2013–2014	Doukas
As coach:
2015–2023	Panathinaikos (Youth academy)
2020–2022	Panathinaikos (assistant)
Career highlights and awards
As player: 2× EuroLeague champion (2000, 2002) 8× Greek Basket League champion (1999–2001, 2003–2006) 3× Greek Cup winner (2003, 2005, 2006)
Medals Men's Basketball Representing  Greece FIBA Under-19 World Cup 1995 Greece Under-19

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In his pro club career, Kalaitzis played with: the Greek Basket League club Panionios, the Italian LBA club Olimpia Milano, and the Greek Basket League clubs Panathinaikos, Aris, Panellinios, and Kolossos. He ended his playing career with Doukas, of the Greek 3rd Division.^[1]

With Greece's under-19 national team, Kalaitzis won the gold medal at the 1995 FIBA Under-19 World Cup. As a member of the senior men's Greek national team, he played at the 1997 EuroBasket, the 1998 FIBA World Championship, the 1999 EuroBasket, and the 2001 EuroBasket.

Kalaitzis became the head coach in the youth academy of Panathinaikos in 2015. In January 2020, he joined the senior men's first team of Panathinaikos, working as an assistant coach to Rick Pitino.