Thomas "Themis" Khatzis (born 23 July 1972) is a Greek former water polo player who competed in the 1996 Summer Olympics (6th place) and the 2000 Summer Olympics (10th place) with the Greece men's national water polo team.

[1] Khatzis started his career at Poseidon Ilision and in 1992 he moved to Olympiacos where he played for twelve consecutive seasons (1992–2004), winning 20 major titles (1 LEN Euroleague, 1 LEN Supercup, 9 Greek Championships, 7 Greek Cups and 2 Greek Supercups).

[2] Khatzis was a key player in Olympiacos' 2002 Quardruple (LEN Champions League, LEN Super Cup, Greek Championship, Greek Cup all in 2002), scoring 2 goals in the 2002 LEN Champions League final win (9–7) against Honvéd in Budapest.

[3][4] He was the captain of Olympiacos in the 2002 LEN Super Cup win against Vasas (6–5) in Budapest.

This biographical article relating to a Greek water polo figure is a stub.