Alexander Zverev claimed a rare victory against Stefanos Tsitsipas on Friday to reach the Paris Masters semi-finals. Third seed Zverev served well en route to a 7-5, 6-4 success at Bercy Arena in 1 hour 40 minutes. It was his sixth victory in the 16th meeting with Tsitsipas, whose hopes of qualifying for the ATP Finals ended with the defeat. Zverev became the third active player and eighth overall to reach a 20th Masters series semi-final. “I got into the match and I found my rhythm and felt more and more comfortable and am happy with the win,” the ATP website quoted Zverev as saying. “I thoug…