is a Swiss professional tennis player. He is ranked No. 5 in the world by the Association of Tennis Professionals (ATP). He has won 20 Grand Slam men's singles titles, an all-time record shared with Rafael Nadal. Federer has been No. 1 in the ATP rankings a record total of 310 weeks – including a record 237 consecutive weeks – and has finished as the year-end No. 1 five times. Federer has won 103 ATP singles titles, the second-most all-time behind Jimmy Connors and including a record six ATP Finals.