Roger Federer "really happy" with opening win at ATP World Tour Finals

Federer
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Roger Federer admits that he was "really happy" with his performance in his straight-sets win over Jack Sock at the ATP World Tour Finals.

Roger Federer has admitted that he was delighted to get off to a winning start at the ATP World Tour Finals in London.

On Sunday, the second seed ran out a 6-4 7-6 winner over Jack Sock - who is making his debut at the event - to take the first step towards claiming a seventh title.

Federer was competing for the first time in two weeks after choosing to withdraw from the Paris Masters, but the Swiss was happy to come through without dropping a set against the big-serving American.

The 36-year-old is quoted by BBC Sport as saying: "I got off to a great start, my big hope was I was going to be able to play a bit more freely after that.

"The second set was tight, I missed some opportunities, the breaker could have gone either way and in the end he helped me with some double faults and some mistakes. I'm really happy that I got through somehow."

Federer will now face Alexander Zverev in his next group game after the young German came through in three sets against Marin Cilic.

Rafael Nadal of Spain celebrates defeating Kei Nishikori of Japan in the final match during day seven of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 24, 2016
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