World tennis number one Roger Federer has defeated number two Rafael Nadal in the Masters Cup semi-final, 6-4, 6-1.
The Swiss player will now face David Ferrer in Sunday's final in Shanghai. The Spaniard overcame American Andy Roddick in straight sets, 6-1, 6-3.
It took Federer less than an hour to dispose of his nemesis, Nadal. The Spaniard proved a strong challenger in the first set but could not capitalise on the one chance he had to break service.
Federer walked through the second set in only 20 minutes and was ahead 5-0 before Nadal was able to salvage some of his pride and erase the zero beside his name.
Serving at 5-1, Federer hit an overhead winner to set up match point, and Nadal netted a backhand to finish it off in 59 minutes - the exact time that Federer needed to blitz Roddick on Friday.
Federer was sovereign on the court, succeeding with 83 per cent of his first serves, of which 11 were aces.
The head-to-head scorecard between the world's two best tennis players is now 6-8 in favour of Nadal.
Friday's match against Roddick was nearly a repeat of the Australian Open semifinals when Federer annihilated the American, allowing him only six games in three sets.
But Federer, who had looked in danger after losing his opening match against Fernando Gonzalez, was thoroughly dominant.
In Sunday's final, Federer will be up against sixth-seeded Ferrer, the surprise of the year-end tournament showcasing the talents of the top eight men in the world rankings.
The Swiss star won the Masters Cup in 2003, 2004 and 2006 and was runner-up in 2005, when he was beaten by David Nalbandian in a five-set thriller.
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Roger Federer has led the world rankings of the ATP (Association of Tennis Professionals) since February 2004.
In 2007 he won seven titles, including three Grand Slams - Australia, United States and Wimbledon.
The ATP named Federer "Player of the Year" for the third year in a row.
He was Swiss sportsman of the year in 2003, 2004 and 2006.
Federer has been an ambassador for the children's aid organisation Unicef since April 2006.
Date of birth: August 8, 1981
Plays: Right-handed, single-handed backhand
Turned professional: 1998
Titles: 52 (Grand Slams: 12)
Prize money: $36,007,078