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Aces by No. 14 seed Nick Kyrgios in a 6-3, 1-6, 6-4, 6-1 firstround loss to fellow Australian John Millman in the U.S. Open. In the third set, Kyrgios received on-court medical treatment and at one point asked a ball boy to grab and stretch his arm. “My arm felt numb,” he said. “My arm is not broken, but it was sore.”