Receive Breaking News updates as they occur
Novak Djokovic didn't let Philipp Kohlschreiber stand in the way of another Grand Slam quarter-final berth on Monday, reaching the US Open last eight with a straight-sets win over the German. Serbia's world number one defeated Kohlschreiber 6-1, 7-5, 6-4 on another muggy day at Flushing Meadows, reaching the last eight at the US Open for the eighth straight year. It's his 22nd successive Grand Slam quarter-final, a run that stretches back to Kohlschreiber's victory over him in the third round of the 2009 French Open. The Wimbledon champion looked headed for a short day's work when he raced through the first set in 25 minutes.