For more than a year, Novak Djokovic's right elbow hurt when he hit serves or forehands. The pain kept getting worse, and now he's going to give his arm a chance to heal by sitting out the rest of 2017. Djokovic will miss the U.S. Open, ending his streak of participating in 51 consecutive Grand Slam tournaments, and aims to return to the ATP tour in January. He made the announcement Wednesday -- exactly a year to the day after Roger Federer said he would be sidelined for the second half of last season. read more http://www.espn.com/tennis/story/_/...-sit-rest-2017-including-us-open-elbow-injury