Nicholas Massu was Chile's first Olympic gold medalist, capturing both the Singles and Doubles (with Fernando Gonzales) championships at the 2004 Games. That same year he was ranked #9 in World Singles.

"Vampiro" as he was known in his home country, Massu was the first male to win gold medals in both Olympic Singles and Doubles in the same Games.

At age 18, he won the 1997 Junior Doubles championships at both Wimbledon and the U.S. Open. He joined Chile's Davis Cup team, has served as its captain, and has a 29-17 Davis Cup Singles record. Massu also represented Chile at the 2002 and 2008 Olympics.