NEW YORK -- Top-seeded Novak Djokovic spent a short day in the office at the US Open on Friday, lashing forehands and feathering drop shots for just 31 minutes before Mikhail Youzhny threw in the towel with a hamstring pull while trailing 4-2 in the first set.
It was still a longer workday than Djokovic experienced Wednesday, when he never punched in at the National Tennis Center at all. Jiri Vesely, his second-round opponent, issued a walkover due to a sore arm.