Agustín Calleri is a retired professional male tennis player from Argentina. His nickname is Gordo which means Fat in Spanish. He is known as a hard-hitter and he prefers playing on clay.

Marat Mubinovich Safin is a Russian former world No. 1 tennis player and former politician. Nicknamed 'Safinator', he achieved the Association of Tennis Professionals (ATP) top singles ranking on 20 November 2000. Safin began his professional tennis career in 1997, and held the No. 1 ranking for a total of nine weeks between November 2000 and April 2001. When Safin became the world's number one player in 2000, he became the youngest world number one in tennis history. He won his first major title at the 2000 US Open, defeating Pete Sampras in the final, and his second at the 2005 Australian Open, defeating Lleyton Hewitt in the final. Safin helped lead Russia to Davis Cup victories in 2002 and 2006. Despite his dislike of grass courts, he became the first Russian man to reach the Wimbledon semifinals in 2008.