Coco Gauff has won her first match since enlisting someone to help with her shaky serving and moved into the second round at the U.S. Open. The No. 3-seeded Gauff got off to a rocky start and was broken a total of six times before pulling away to defeat 79th-ranked Ajla Tomljanovic 6-4, 6-7 (2), 7-5 in Arthur Ashe Stadium on Tuesday night. Gauff avoided a second consecutive first-round Grand Slam exit after bowing out right away at Wimbledon. She started working recently with Gavin MacMillan, a biomechanics expert who helped current No. 1 Aryna Sabalenka retool her serve a few years ago.
