As of 2022, which men's tennis player holds the record of being world No. 1 for 237 consecutive weeks?

Roger Federer (born 8 August 1981) is a Swiss professional tennis player. He is ranked No. 16 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 and Novak Djokovic. Federer has been world No. 1 in the ATP rankings a 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 of all-time behind Jimmy Connors, including a record six ATP Finals.

Federer has played in an era where he dominated men's tennis together with Rafael Nadal and Novak Djokovic, who have been collectively referred to as the Big Three and are considered by some to be the three greatest tennis players of all time. A Wimbledon junior champion in 1998, Federer won his first Grand Slam singles title at Wimbledon in 2003 at age 21.