Roger Federer (born 8 August 1981) is a Swiss (Switzerland) professional tennis player. As of October 2009, he is ranked world number 1 (List of ATP number 1 ranked players) by the Association of Tennis Professionals (ATP), having previously held the number one position for a record 237 consecutive weeks (ATP World Tour records#Ranking). Many sports analysts, tennis critics, and former and current players consider Federer to be the greatest tennis player of all time.

Federer has won 15 Grand Slam (Grand Slam (tennis)) singles titles, more than any other male player. He is one of six male players to have captured the career Grand Slam (Grand Slam (tennis)#Career Grand Slam). Federer has appeared in an unprecedented 21 career Grand Slam finals, and as of September 2009, has reached the semi-finals or better of the last 22 Grand Slam tournaments, a streak that spans over five years. Federer also holds the record (Roger_Federer#Records) of reaching 10 consecutive Grand Slam finals and has appeared in 17 of the last 18. As a result of his successes in tennis, Federer was named the Laureus World Sportsman of the Year (Laureus World Sports Awards) for four consecutive years (2005-2008).

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