The Kosovo Tennis Federation has accused Serbia's Novak Djokovic of aggravating an already tense situation after the world No. 3 wrote that Kosovo was "the heart of Serbia" on a camera lens following his first-round win at the French Open. "Despite a general message against violence, the statement 'Kosovo is the heart of Serbia' and further statements after the match, made by such a public figure...directly result in raising the level of tension between the two states, Serbia and Kosovo," Kosovo Tennis Federation President Jeton Hadergjonaj said on May 30 in a statement. To read the original story by Reuters, click here.