Maria Sharapova, a five-time Grand Slam singles champion known for plenty of on-court grit and off-court attention, and Bob and Mike Bryan, twins who won a record 16 major titles in men's doubles together, are first-ballot selections for the International Tennis Hall of Fame. Sharapova won at least one championship at each of her sport's four most prestigious events, making her one of 10 women in tennis history to complete a career Grand Slam, and was the first Russian woman to reach No. 1 in the WTA singles rankings. The Bryan brothers also compiled a career Grand Slam and spent 438 weeks at No. 1 in the ATP doubles rankings.