US Open: Djokovic troubled by shoulder pain

New York - The world number one received medical treatment to his left shoulder throughout the match on his way to a 6-4, 7-6 (7/3), 6-1 win

Defending US Open champion Novak Djokovic complained of feeling "quite rough and unpredictable" as a nagging shoulder problem hampered him during Wednesday's second round win over Juan Ignacio Londero.
The world number one received medical treatment to his left shoulder throughout the match on his way to a 6-4, 7-6 (7/3), 6-1 win and said he feared the injury could have forced him to retire.
"It was not easy to play with this kind of sensation, to be honest. I did not experience that too many times in my career," Djokovic said.
"I had obviously, you saw, a medical timeout. At changeovers, I tried to use within the rules as much as I can physiotherapy and medical help. That has definitely helped me stay in the match.
"The way it has started for me, especially midway through the first set, I didn't know if I would be able to finish the match."