Roger Federer and Rafael Nadal are professional tennis players engaged in a storied rivalry that many consider to be among the greatest in tennis history. They have held the top two rankings on the ATP Tour from July 2005 to date, except from August 17 until September 14 2009, when Nadal fell to World No. 3 (Andy Murray was No. 2 during that time). They are the only pair of men to have ever finished four consecutive calendar years at the top. Federer was ranked No. 1 for a record 237 consecutive weeks beginning in February 2004. Nadal, who is five years younger, ascended to No. 2 in July 2005 and held this spot for a record 160 consecutive weeks before surpassing Federer in August 2008. Nadal leads their overall head-to-head series 13 7. Because tournament seedings are based on rankings, 16 of their matches have been in tournament finals, including an all-time record 7 Grand Slam finals. From 2006 to 2008 they played in every French Open and Wimbledon final, and then they met in the 2009 Australian Open final. Nadal won five of the seven, losing the first two Wimbledons.