Roger Federer, born on 8th August 1981, Basel, Switzerland, is a professional tennis player, who's won 20 Grand Slam singles titles, the most in history by a male player, having held the world No. 1 position at the top of the ATP rankings for a record total of 310 weeks, including a record 237 consecutive weeks. After turning professional during 1998, Federer was continuously ranked in the top 10 from October 2002 to November 2016. Roger re-entered...