Australia's Alex de Minaur needed just seven minutes to claim his fourth ATP Tour singles title at the Antalya Open.
The fourth seed was leading Alexander Bublik 2-0 in the first set when the Kazakhstani retired through injury.
"I knew I’d put in a great pre-season, I felt good and ready to compete," De Minaur told the ATP Tour website after adding a Turkish victory to hardcourt titles at the Sydney International, the Atlanta Open and the Zhuhai Championships.
"I got some quality wins and now I’m looking forward to returning to Australia, where I hope to have a good Aussie summer in front of a home crowd."
Eighth seed Bublik had twisted his right ankle during his semi-final victory over Jeremy Chardy on Tuesday.
Bublik said: "I tried to play. I was in the physio room for three hours yesterday and I tried to get ready for the match.
"It’s hard for me in my third ATP Tour final, and I’ve never gotten the win."