Roger Federer beats Novak Djokovic at ATP World Tour Finals

Roger Federer brought Novak Djokovic's three-year unbeaten run indoors to an end to secure a semi-final place at the ATP World Tour Finals.

The Swiss six-time champion won 7-5 6-2, ensuring he will progress from the group stage with one match remaining.

Djokovic, winner of the past three season-ending titles in London, had won his previous 38 indoor matches.

The Serb will play Tomas Berdych in his final group match on Thursday and can still qualify for the last four.

Federer will play Japan's Kei Nishikori, who beat Berdych 7-5 3-6 6-3 in the afternoon session.
"It's always a thrill to come out here, even more so against a great player like Novak," said the 17-time Grand Slam champion.
"It's a special night for tennis, and a cool atmosphere."

BBC