World No. 1 Jannik Sinner returned to the hard courts with a commanding 6-1, 6-1 victory over Colombian qualifier Daniel Galan in the Cincinnati Open second round on Saturday, his first match since lifting the Wimbledon trophy last month. The defending champion needed just 59 minutes, struck only four unforced errors and stretched his hard-court winning streak to 22 matches—his last loss on the surface came 311 days ago. The 22-year-old Italian, who received a first-round bye, will meet Canada’s Gabriel Diallo in the third round as he continues his bid to retain both his Cincinnati and US Open titles. “It’s very difficult to play here, the ball is flying,” Sinner said in a courtside interview, adding that confidence can disappear quickly in the quick conditions. On the women’s side, third seed Iga Swiatek opened her campaign with a 6-1, 6-4 win over Anastasia Potapova, her 45th victory of the season. The Pole, rebounding from an early exit in Montreal, next faces Ukraine’s Marta Kostyuk as she fine-tunes for Flushing Meadows.