Roger Federer: He is ranked No. 5 in the world by the Association of Tennis Professionals. He has won 20 Grand Slam men's singles titles, an all-time record shared with Rafael Nadal.
Rafael Nadal: Rafael Nadal Parera is a Spanish professional tennis player. He is ranked No. 2 in the world by the Association of Tennis Professionals. Nadal has been ranked No. 1 in the ATP rankings for 209 weeks, and has finished as the year-end No. 1 five times.
Novak Djokovic: Novak Djokovic is a Serbian professional tennis player. He is currently ranked as world No. 1 by the Association of Tennis Professionals. Djokovic has been No. 1 for 308 weeks, and has finished as year-end No. 1 on six occasions, an Open Era record shared with Pete Sampras.
Serena William : Serena Jameka Williams is an American professional tennis player and former world No. 1 in women's single tennis. She has won 23 Grand Slam singles titles, the most by any player in the Open Era.
Andy Murray : Andrew Barron Murray OBE is a British professional tennis player from Scotland. He has been ranked world No. 1 by the Association of Tennis Professionals for 41 weeks, and finished as the year-end No. 1 in 2016.