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.
Carlos Velásquez Carlos Iván Velásquez (born August 4, 1984 in Cataño, Puerto Rico) is a Puerto Rican amateur boxer best known as winning the featherweight title at the 20.Central American and Caribbean Games 2006 in Cartagena. He is the twin brother of Juan Carlos Velasquez.