| By New York Tennis Magazine Staff
Photo credit: Kenneth B. Goldberg

World number one-ranked Serbian Novak Djokovic defeated Tomas Berdych of the Czech Republic, 3-6, 6-3, 7-6, after saving a match point in the third to avoid becoming another upset of the day at the ATP World Tour Finals at the O2 Arena in London. Earlier in the day, Great Britain's Andy Murray was taken down by Spain's David Ferrer in straight sets, 6-4, 7-5, as Murray appeared to have suffered a groin injury that he fears will end his run at the tournament.

"If it wasn't Slams or this event, I wouldn't have played," said Murray.

Djokovic has been resting a shoulder injury, however, held back strong hitting by Berdych, who at one point had match point in the third when he was up 6-5.

"I wasn't very satisfied with my performance tonight. I know I wasn't playing on top of my game," said Djokovic.

Murray remains concerned about his chances of playing on in the event, but did say that it would be "really gutting" to have to withdraw. Janko Tipsarevic will replace Murray should he not be able to play on against Berdych.