BRAND-NEW YORK - Novak Djokovic leaned on a doctor to reach the quarter-final at the U.S. Ajar Gilles Muller established a bantam luck helps, too. ADVERTISEMENT The third-seeded Djokovic overcame hip, ankle and stomach ailments Tuesday to outlast Tommy Robredo 4-6, 6-2, 6-3, 5-7, 6-3.
