Roger Federer clinched a place in the semi-finals of the ATP Tour Finals on Thursday as the defending champion ground out a 6-4, 7-6 (7/5) win over Spain's David Ferrer at London's O2 Arena.
Switzerland's Roger Federer returns to Spain's David Ferrer during their group B singles match in the round robin stage on the fourth day of the ATP World Tour Finals at London's O2 Arena on November 8, 2012. Federer clinched a place in the semi-finals on Thursday as the defending champion ground out a 6-4, 7-6 (7/5) win over Ferrer.
Federer required a straight sets win over the fourth seed to seal his spot in the last four with one Group B match to spare and he reached that goal despite a scrappy performance that included 39 unforced errors.
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