Federer seeded above Nadal at Wimbeldon

Roger Federer has been seeded ahead of great rival Rafael Nadal for his 21st appearance at Wimbledon.

Wimbledon is unique among the grand slams in having a formula to calculate seedings giving weight to grass-court performances, and Federer will be the number two seed and Nadal three in a reversal of their world ranking positions.

That means Nadal, who was critical of the system in an interview with Spanish TV on Tuesday, is guaranteed to be in the same half of the draw as either Federer or top seed and defending champion Novak Djokovic.