Top-seeded Alexander Zverev rallied to defeat No. 18 Alexei Popyrin of Australia 6-7 (8), 6-4, 6-3 on Monday to reach the semifinals of the National Bank Open.

The victory took the German's head-to-head record against Australian Popyrin to 4-0 and sent him to his 75th semi-final on the ATP Tour.

Alexei Popyrin has a very special feeling with the Canadian Open, which takes place in Toronto in this edition. The Australian ace surprised the world in Montreal last season, when he won the first Masters 1000 title of his career by beating Russian star Andrey Rublev in the final.