Nadal and Federer warm up on sea surface

Spain's Rafael Nadal (L) and Roger Federer of Switzerland pose after warming up at the West Bay during an exhibition match to promote the city of Doha, Jan 2, 2011, one day before the Qatar Open.

Spain's Rafael Nadal (L) and Roger Federer of Switzerland warm up at the west bay during an exhibition match to promote the city of Doha, one day before the Qatar Open in Doha, Jan 2, 2011.

(Agencies)