Top seed Alexander Zverev is into the semifinals at the National Bank Open in Toronto after surviving a pair of three-set tests. The world No. 5 needed to dig deep in the third round against Matteo Arnaldi and again in the quarterfinals against Alexei Popyrin,

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

Alexander Zverev came back from a set down on Monday to send Toronto reigning champion Alexei Popyrin packing and reach the semi-finals of the Canadian Open. The world number three dropped the first set but eventually defeated his Australian opponent 6-7 (8-10),