Sinner plays through fire alarm to beat Diallo

World number one Jannik Sinner played through a fire alarm to beat Gabriel Diallo and reach the fourth round of the Cincinnati Open.

The alarm began to sound and lights started flashing in the second game of the second set but the pair agreed to play through it after a delay of several minutes.

Sinner, 23, remained composed and booked his spot in the last 16 with a 6-2 7-6 (8-6) victory against the Canadian.

“It was a very difficult day at the office,” Sinner said.

“You have to find the balance against these big servers. I struggled with that at times today.

The third-round tie started later than expected because of a 75-minute power cut, which cut the TV feed and left the venue without electronic line calling.

Sinner was broken in his opening service game but hit back with three successive breaks of his own to wrap up the set.

The second was much more competitive and went to a tie-break after staying on serve, with defending champion Sinner holding on for victory.

Next up for Sinner is French qualifier Adrian Mannarino as the Italian looks to build momentum for the US Open later this month.