Which of the following has a twin brother who plays doubles together: Gigi Fernández or Mike Bryan?
Gigi Fernández Beatriz "Gigi" Fernández (born February 22, 1964) is a former professional tennis player. She turned professional in 1983 and is the first Puerto-Rican-born athlete to win a Gold Medal, and the first to be inducted into the International Tennis Hall of Fame.
Agustín Calleri Agustín Calleri (born 14 September 1976) 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.