Janko Tipsarevic avoided a shock exit from the US Open this afternoon, eventually beating Jack Sock 3-6 7-1(1) 6-1 6-2.

Sock fed off the home crowd in the opening set as he broke Tipsarevic in the fifth game before going on to have three set points in the ninth. He failed to convert the first two of these, but it was third time lucky for him as he took the opening set 6-3.

The entire second set went with serve for both players, but the resulting tie-break was dominated by Tipsarevic, who won three points off Sock's serve to take it 7-1.

From then on, the Serb was in fine form on his own serve while also putting pressure of a break on Sock. Those breaks came in the third set as Tipsarevic took it 6-1 in just under 40 minutes.

The final set took even less time to wrap up as the number 18 seed broke the unseeded American twice to take it 6-2 in just 31 minutes.

Tipsarevic will face David Ferrer in the next round after the Spaniard beat Mikhail Kukushkin earlier today.