Holger Rune surprised top seed Stefanos Tsitsipas with a straight-sets victory in Sunday's Stockholm Open final to land his second ATP title.

Still just 19, Rune added to his maiden crown in Munich five months ago with a 6-4, 6-4 triumph over world No. 5 Tsitsipas in a match lasting 95 minutes.

Tsitsipas, who was seeking a 10th ATP title and a third this season, had not dropped a set in his previous three matches en route to the final.

However, he was broken in the third game of both sets against Rune, who is the second teenager after Carlos Alcaraz to win multiple ATP titles in 2022.

Rune fired 20 winners and saved the only break point he faced - that coming in the sixth game of the second set - on his way to becoming the first Danish champion in this event.

"It was an unbelievable match from my side," Rune said in his on-court interview. "I knew it was going to be difficult, but I just tried to stick to the game plan.

"I had to play my best tennis today, and it was good that I could find the level. I am super happy. It was very close to perfection.

"I was making a lot of returns and playing pretty well behind my serve. Stefanos is an amazing player, who always makes it difficult. It was a super fun match to play."