Konstantinos Economidis is a retired professional Greek tennis player and a former Greek No. 1. In 2007, he qualified for the French Open and defeated Australian Chris Guccione in the first round before losing to Tommy Robredo in the second round. He achieved his career-high singles ranking of world No. 112 in February 2007 and has won 5 Challenger titles.

Chile's Nicolás Massú defeated the United States' Mardy Fish in the final, 6–3, 3–6, 2–6, 6–3, 6–4 to win the gold medal in Men's Singles tennis at the 2004 Summer Olympics. In the bronze-medal match, Chile's Fernando González defeated the United States' Taylor Dent, 6–4, 2–6, 16–14. Massú became the only man to win both the singles and men's doubles gold medals at the same Olympic Games. The two medals were Chile's first in men's singles, and Massú's gold plus the Chileans' doubles gold remain the only two gold medals for Chile at the Olympics.