The Olympic Tennis Centre is a grouping of 16 tennis courts at the Athens Olympic Sports Complex. It hosted the tennis matches at the 2004 Summer Olympics in Athens, Greece. The centre consists of a main stadium, known as the Main Court, seating 8,600 fans - though only 6,000 seats were made publicly available during the Olympics - two semifinal courts seating 4,300 spectators - though only 3,200 seats were made publicly available during the Olympics - and thirteen side courts seating 200 observers each.