The French World No: On an eventful day at the Swiss Open 2026 at Gstaad, the top three seeds failed to survive Friday’s action as top seed Alexander Bublik, Casper Ruud, and Valentin Vacherot all suffered defeat in the ATP 250 event being played on clay in this Swiss town.
Quentin Halys overcame Bublik in three sets while Juan Manuel Cerundolo stunned Norwegian Casper Ruud, the second seed in the event.
Cerundolo, who rallied from two sets and a double break down to stun the physically struggling World No. 1 Jannik Sinner at Roland Garros in May, rediscovered his penchant for a hard-earned upset by downing Ruud 3-6, 7-5, 6-2. The second-seeded Ruud led 4-2 in the second set, but was unable to prevent Cerundolo from completing an impressive quarter-final turnaround after two hours and 15 minutes.