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 sealed the deal in two hours and 42 minutes, overcoming a set deficit and outplaying his rival with a strong performance in sets two and three. Thus, the German secured his 21st Masters 100 semi-final, leaving Andy Roddick on 20.