Roger Federer in Gerry Weber semis
HALLE, Germany -- Roger Federer progressed to the semifinals of the grass-court Gerry Weber Open without playing after Lu Yen-hsun of Taiwan pulled out of their quarterfinal with back problems on Friday.
Federer, who began his preparations for Wimbledon by defeating Portugal's Joao Sousa on Thursday, compensated by playing an exhibition against Christopher Kas, a German player who is 78th in the doubles rankings.
The seven-time Wimbledon winner next faces the fourth-seeded Kei Nishikori ...
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