Korda and Popyrin beat seeded players and reach the semifinals in Montreal

American Sebastian Korda celebrates a 7-6, 1-6, 6-4 quarter-final victory over German Alexander Zverev at the ATP Montreal Masters (Minas Panagiotakis) Sebastian Korda and Alexei Popyrin fought their way through long, exhausting quarterfinals on Sunday and secured their place in…