Simona Halep will appear Masters semi-final against Pegula

Simona Halep played twice in her match against Coco Gauff without success.

Finally, she secured a 6-4, 7-6 (7/2) quarter-final victory at the WTA Toronto Masters.

Halep required a second-set tiebreaker to appear in the semi-finals in just under two hours.

She lost her eighth straight set against the 30-year-old Romanian.

"I'm really pleased with the way I stayed strong mentally," Halep said.

Halep will play her 29th Masters semi-final against Pegula on Saturday.

"It's going to be a big challenge to face a new opponent. It's always like that," Halep said