Djokovic winner in comeback: "My shoulder feels good"

The world set broke against Stan Wawrinka in the US Open's fourth round after severe shoulder problems.

- My shoulder feels good and I had no pain during today's match, says Djokovic to AP.

After feeling ahead in the first set, the Serb was able to push more in the second set.

- I was able to step up in the second set and ended the game in a good way, says Djokovic.

In the next round, Djokovic meets the home player Go Soeda.