Novak Djokovic Booed After Retiring From US Open Match<br />.<br />The U.S. Open's defending champion and No. 1 seed has been eliminated.<br />.<br />Djokovic retired due to an injured shoulder on Sunday night.<br />.<br />He was trailing Stan Wawrinka <br />6-4, 7-5, 2-1 in the match.<br />.<br />The pain was constant <br />for weeks now, Novak Djokovic, via statement<br /><br /><br />.<br />The crowd booed Djokovic as he left the court, <br />likely due to the shortened match time.<br />.<br />I'm sorry for the crowd. Obviously, they came to see a full match, and just wasn't to be. I mean, a lot of people didn't know what's happening, so you cannot blame them.<br />, Novak Djokovic, via statement.<br />Djokovic had won 36 of his past 37 Grand Slam matches and four of the past five major titles.<br />.<br />He has 16 career Grand Slam titles, four shy <br />of Roger Federer's record of 20.
