New York: Reigning champion Novak Djokovic said he felt "almost pain free" as he strolled into the US Open Last 16 on Friday with a 6-3, 6-4, 6-2 victory over Denis Kudla. Djokovic struggled with a left shoulder injury in Wednesday's second-round win, but the top seed looked far more at ease against 111th-ranked Kudla as he advanced to a showdown with 2016 champion Stan Wawrinka.

"I managed to play almost pain free. That's a big improvement from last match," Djokovic said. "Obviously I didn't know how my body would react and I'm glad to just finish the match tonight. I'm not going to go into medical details, but it was definitely bothering me the last couple weeks."