Tomas Machac of the Czech Republic rallied for a 6-7 (5), 6-4, 6-3 win over third seed Grigor Dimitrov of Bulgaria in two hours and 31 minutes to reach the Erste Bank Open quarterfinals on Thursday in Vienna, Austria.Dimitrov out-aced Machac 12-9 and had the same number of winners (32), but he committed 21 unforced errors along the way.
Dimitrov is now in danger of not qualifying for the Nitto ATP Finals; he is 10th in the race for one of eight spots.Machac advanced to face No.
7 seed Jack Draper of Great Britain, who defeated Italy's Luciano Darderi 7-5, 6-1. Russia's Karen Khachanov charged back to beat Brandon Nakashima 1-6, 6-3, 6-4, and Czech qualifier Jakub Mensik beat Serbia's Miomir Kecmanovic 6-3, 7-6 (7).No.
2 seed Alex de Minaur of Australia was ahead 7-6 (2), 3-1 when Italian opponent Flavio Cobolli retired.Swiss Indoors BaselFrenchman Giovanni Mpetshi Perricard upset eighth seed and two-time defending champion Felix Auger-Aliassime of Canada 6-1, 7-6 (6) to make the quarterfinals in Switzerland.Mpetshi Perricard fired 22 aces, had a 30-16 advantage in winners and prevailed on 32 of 39 first-service points (82.0 per cent) in the thorough victory.