Kai Wehnelt will upset Nino Ehrenschneider in the ATP Challenger Sion qualifying on August 17, 2026, on Court 1. The 30-year-old Wehnelt, born November 27, 1995 and carrying an ATP rank of 692 with a peak of 513 on September 9, 2019, will advance into the Sion draw by beating the higher-ranked oppo…