Zverev and Rybakina book Canadian Open semis berth

Alexander Zverev reached his 21st Masters 1000 semifinal on Monday by ending the Canadian title defence of Alexei Popyrin 6-7 (8/10), 6-4, 6-3 at the ATP Toronto Masters.

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The final game, with Zverev serving at 5-3, was interrupted by shouts from an unruly fan who was tossed out by security.

The distraction ended a run of 14 consecutive points on serve, with the seed double-faulting once he was able to continue serving.

He finished off the evening with a sharp volley winner at the net on his first match point.

Zverev completed his 40th win of the year in just over two and a half hours.

The world number three won the tournament in 2017 but had not been past the quarterfinals in Canada since.

"After losing the first set, I had to tell myself we were both playing well," the holder of seven Masters trophies said.

"I had one or two mistakes at the end of the first, but it was a high-level match.

"I felt that if I kept playing well, I would get my chances -- and I did. I can't complain about the second and third sets."

Zverev will bid for the oddly scheduled Thursday final against three-time semifinalist Karen Khachanov, who dismissed young American Alex Michelsen 6-4, 7-6 (7/3).

"It was a very close, competitive match," Khachanov said. "I had to come back from some tough situations.