Nicolás Alejandro Massú Fried, nicknamed El Vampiro, is a Chilean former professional tennis player and a coach. A former world No. 9 in singles, he won the singles and doubles gold medals at the 2004 Athens Olympics. He is the only man to have won both gold medals at the same Games since the re-introduction of Olympic tennis in 1988, and they are Chile's only two Olympic gold medals. Massú also reached the final of the 2003 Madrid Masters and won six singles titles. He was the coach of 2020 US Open champion and former world No. 3 Dominic Thiem from 2019 to 2023.

Guillermo Sebastián Coria, nicknamed El Mago, is an Argentine retired professional tennis player. He reached a career-high ATP world No. 3 singles ranking in May 2004. Coria achieved his best results on clay, where he won eight of his nine ATP singles titles, and during his prime years in 2003 and 2004 was considered "the world's best clay-court player." He reached the final of the 2004 French Open, where he was defeated by Gastón Gaudio despite serving for the match twice and being up two sets to love. In later years, injuries and a lack of confidence affected his game, and he retired in 2009 at the age of 27. Between 2001 and 2002, he served a seven-month suspension for taking the banned substance nandrolone.