Top-seeded Alexander Zverev, bouncing back after squandering two set points in the first set, rallied for a 6-7 (8), 6-4, 6-3 win over 18th-seeded Alexei Popyrin in the quarterfinals of

TORONTO (AP) — 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. Zverev, the 2017 tournament champion, will face No. 11 seed Karen Khachanov of Russia, who beat No. 26 Alex Michelsen of the U.S. 6-4, 7-6 (3).