Cincinnati, Aug. 12 -- Defending champion Jannik Sinner advanced to the fourth round of the ongoing Cincinnati Masters, defeating Gabriel Diallo in a third-match interrupted by a fire alarm on Tuesday.

The world number one experienced something he had never seen before, his match getting interrupted during the second set, when a fire alarm at the 1899 club grandstand began to sound. It was several minutes before the game could start once again, and players played through sounds and flashes, with Sinner winning the battle 6-2, 7-6(6) after saving a set point with a clutch forehand service return in the tie-break.

Following his win, Sinner said, as quoted by ATP's official website, "It was a very difficult day at the office. He was servin...