Portugal’s Joao Sousa upset third-seeded Dominic Thiem of Austria 6-4, 7-6 (5) on Saturday to reach the final of the St. Petersburg Open.
Thiem won more points overall than Sousa did, but his serving was inconsistent, with 11 aces balanced out by landing just 46 percent of his first serves. It was the seventh-seeded Sousa’s first win against Thiem in four meetings.
In Sunday’s final, Sousa will face second-seeded Milos Raonic of Canada, who beat fourth seed Roberto Bautista Agut of Spain 6-2, 7-6 (2) in the second semifinal.
Sousa has lost his last four ATP finals since winning his only title against Julien Benneteau at the 2013 Malaysian Open.