Denmark's Holger Rune wrote another chapter into his standout season on Sunday as he clinched the men's singles title at the Stockholm Open, upsetting top seed Stefanos Tsitsipas 6-4, 6-4 in the final, here.

The 19-year-old opened his shoulders and hit through the World No.5 throughout the one-hour, 35-minute clash, firing 20 winners and saving the one break point he faced to earn his third Top 5 win.