Roger Federer reaches semifinals at ATP finals

By CHRIS LEHOURITES | November 8, 2012 | 11:33 AM EST

Roger Federer of Switzerland serves to David Ferrer of Spain during their ATP World Tennis Finals singles match in London Thursday, Nov. 8, 2012. (AP Photo/Kirsty Wigglesworth)

LONDON (AP) — Roger Federer advanced to the semifinals at the ATP finals with a match to spare.

The six-time champion earned his second straight victory at the season-ending tournament, this time beating David Ferrer 6-4, 7-6 (5) on Thursday.

But it wasn't so easy for the 17-time Grand Slam champion, who improved his record to 14-0 against Ferrer. Two days after controlling his opening match against Janko Tipsarevic with a dominating serve, Federer faced 10 break points and saved nine of them.

In the late Group B match, Tipsarevic will face Juan Martin del Potro.