Top-seeded Alexander Zverev advances to National Bank Open quarterfinals

TORONTO AP Top-seeded Alexander Zverev of Germany led Francisco Cerundolo - - when the th-seeded Argentine retired because of an abdominal injury Saturday night in the National Bank Open Zverev advanced to face defending champion Alexei Popyrin of Australia in the quarterfinals The th-seeded Popyrin beat fifth-seeded Holger Rune of Denmark - - - in the first night match Zverev the champion ranked third in the world ended up the top seed with top-ranked Jannik Sinner the winner and No Carlos Alcaraz skipping the hard-court event that ends Thursday No Jack Draper and No Novak Djokovic also sat out Zverev won on clay in Munich in April for his th tour title Alex Michelsen reached the quarterfinals in the afternoon topping fellow American Learner Tien - - Michelsen will face th-seeded Karen Khachanov of Russia a - - winner over eighth-seeded Casper Ruud of Norway AP tennis https apnews com hub tennis Source