Medvedev, champion in Cincinnati in 2019, sharpened his game for his upcoming US Open title defence with a 7-6 6-3 win over 11th seeded Fritz, while Tsitsipas could manage only a single break chance in a three-set slugfest with Isner but it was enough to clinch a 7-6 5-7 6-3 victory.
While it looked a comfortable win for Medvedev it was anything but, with the Russian saving three set points in the opener before finally prevailing 7-1 in the tie-break. “There were some set points where I could have missed and no one would have talked about it, it would have been normal.Breaks were just as scarce in the Tsitsipas and Isner match.
Up 4-3 and with Isner serving, Tsitsipas would finally get his one and only break chance, and he made it count – punching the air in delight as he watched the American’s return sail long for a 5-3 lead. British number one Cameron Norrie held off third seed Carlos Alcaraz to claim a 7-6 6-7 6-4 win and book his place in the semi-finals, where he will face Borna Coric after the Croatian saw off Felix Auger Aliassime 6-4 6-4.