Near East (2002–2004) Xanthopoulos started his professional career with the
Greek Basket League club
Near East in 2002.
Panathinaikos (2004–2005) Xanthopoulos transferred from
Near East to the Greek powerhouse
Panathinaikos in 2004.
PAOK (2005–2006) In 2005, Xanthopoulos was
loaned by
Panathinaikos to
PAOK.
Panathinaikos (2006–2007) In 2006, Xanthopoulos returned to
Panathinaikos Athens, and with them he won the
European Triple Crown in 2007. His team accomplished this by winning the
Greek League championship, the
Greek Cup, and the
EuroLeague all in the same season.
Panionios (2007–2009) In 2007, Xanthopoulos transferred to the Greek club
Panionios.
Panellinios (2009–2011) In 2009, Xanthopoulos moved to the Greek club
Panellinios.
Panionios (2011–2012) In 2011, Xanthopoulos rejoined
Panionios.
Panathinaikos (2012–2013) In 2012, Xanthopoulos returned to
Panathinaikos as an auxiliary player.
Obradoiro (2013–2014) Xanthopoulos moved to the
Spanish League club
Obradoiro in 2013.
Panionios (2014–2015) Xanthopoulos returned for a second stint with
Panionios in 2014.
Aris (2015–2017) In 2015, Xanthopoulos moved to
Aris, where he spent two seasons.
AEK (2017–2019) On July 5, 2017, Xanthopoulos moved to
AEK Athens of the
Greek Basket League, where he signed a one-year contract, with the option of renewal for another season. With AEK, he won the
Greek Cup title,
in 2018, as well as the
FIBA Champions League title during the same season.
Peristeri (2019–2020) On July 1, 2019, Xanthopoulos and
AEK officially parted ways. Three days later, Xanthopoulos joined the Greek club
Peristeri. He averaged 2.6 points, 1.6 rebounds and 3.5 assists per game with Peristeri. On August 13, 2020, Xanthopoulos left the team.
Kolossos Rodou (2020–2022) On August 21, 2020, Xanthopoulos moved to the Greek club
Kolossos Rodou. On June 30, 2021, he renewed his contract with the
Greek island team, and was named
team captain. In 17 games, he averaged 4.2 points (shooting with 36% from the 3-point line), 2.4 rebounds, 4.9 assists and 1 steal in 20 minutes per contest. He was ruled out just before the end of the season, due to an unspecified injury.
Return to AEK (2022–2023) On August 29, 2022, Xanthopoulos returned to
AEK for a second stint, following his
Kolossos head coach
Ilias Kantzouris to the team. In 22 league games, he averaged 2.4 points, 1 rebound and 3.8 assists in 14 minutes per contest.
Peristeri (2023–2025) On July 29, 2023, Xanthopoulos returned to
Peristeri, under head coach
Vassilis Spanoulis. On May 3, 2025, Xanthopoulos announced his retirement from professional basketball after the last game of the season against Panionios. ==National team career==