Albert Ramos Vinolas claimed his third title by beating Cameron Norrie in the Estoril final on Sunday with the vanquished Briton describing the Spaniard as "a big brother".
Ramos Vinolas, ranked 46 in the world, triumphed 4-6, 6-3, 7-6 (7/3).
For the 33-year-old, it was a first title since Gstaad in 2019 while Norrie, ranked at 50, is still waiting to break his career duck.
"Albert is like a big brother on tour for me. It's tough to lose, but Albert was better than me in the end," Norrie said at the trophy ceremony.
Ramos Vinolas is now 16-5 on clay this year and has seven more clay court victories than any other player.
"It means a lot to win the title. I won three tournaments in my career, so this is one of the best three weeks in my career. I am really happy," he said.
"It was a really difficult match against Cameron. I think he played a really good tournament.
"I am happy for me, but he is a really good friend of mine and I am sorry for him, because I think he deserved to win the tournament as much as me."
As well as Estoril on Sunday and Gstaad in 2019, the Spaniard's other title was also on clay at Bastad in 2016.