US open: Novak Djokovic defeats Denis Kudla and reaches in last 16

(G.N.S) Dt. 31 Djokovic’s title defence looked to be in jeopardy in his previous match when he received treatment on his shoulder several times, an issue which he said had impacted his serve and backhand. Novak Djokovic silenced concerns about his left shoulder as the Serbian breezed past American Denis