Tennis: Djokovic, Federer stretched

Australian Open champion Novak Djokovic and top seed Roger Federer survived early onslaughts to reach the Dubai championships semifinals.

Djokovic recovered to beat Germany's Florian Mayer 7-5 6-1 and Federer defeated Ukraines's Sergiy Stakhovsky 6-3 6-4.

The second-seeded Serbian plays third seed Tomas Berdych while Federer faces unseeded Richard Gasquet.