No. 2 seed Alexander Zverev and No. 3 seed Stefanos Tsitsipas will square off in the semifinals of the Monte Carlo Masters in Monaco after each player won his quarterfinal match in three sets on Friday. Zverev, the German ranked third in the world, outlasted Italian No. 9 seed Jannik Sinner 5-7, 6-3, 7-6 (5) in three hours and seven minutes. His Greek counterpart also endured a marathon, as Tsitsipas beat 12th seed Diego