Stan Wawrinka's finals winning streak was halted at 11 on Sunday when Germany's Alexander Zverev posted a stirring 6-2, 3-6, 7-5 victory in the championship match of the St. Petersburg Open in Russia.
The upset marks the first ATP win for the fifth-seeded Zverev. The 19-year-old is the first man to beat the Swiss standout in a final since 2013.