Martin Jol is confident Sascha Riether will be happy if Fulham take up their option to keep the full-back at Craven Cottage beyond this season.
Riether joined Fulham on a season-long loan from Cologne last summer and he has made 30 appearances in all competitions, missing just one game in the Premier League.
Fulham have first option to retain the 29-year-old and Jol reiterated his intention to ensure Riether is part of his squad next season.
"Sascha is a fans' favourite," Jol told Deutsche Pressagentur. "He is the right-back in my starting XI.
"He runs, he works and he has a good view of situations. I am glad to have him at this club.
"We possess an option [to buy him]. If we are to exercise it, he will have to remain at our club. But if he is not happy, we would have to talk then.
"But I really don't think that this is the case with him. I think he feels fine being a first-team regular with us."
Illness forced Riether to miss the 0-0 draw at Norwich City earlier this month when he was replaced by January signing Stanislav Manolev, but he returned to the team for last Saturday's 1-0 win over Stoke City.
The Bantams overcame Wigan, Arsenal and Aston Villa in a remarkable run all the way to Wembley, but Sunday's showpiece final did not have a fairytale ending as slick Swansea proved a Premier League side too many.
Nathan Dyer and Jonathan De Guzman struck twice each for Swansea and Michu lived up to his pre-match billing with another as the 5-0 scoreline secured Michael Laudrup's side the biggest win in Wembley cup final history.
But Phil Parkinson's League Two side have given the city of Bradford cause for huge celebration and inspired lower league clubs all over the world, and this was not lost on Duke as he reflected on his side's defeat.
"It's not just about the final," said Duke, who had the added disappointment of having been sent off early in the second half by referee Kevin Friend for tripping De Guzman in the penalty area.
"It's been the whole cup run going back to the first day of the season (when City won at Notts county in the first round).
"Every game through the rounds has been top-drawer entertainment.
"We're really disappointed with the result, but the overall achievement has got to be looked back on with real pride.
"It's not been achieved in the last 50 years and it might take another 50 years or even a 100 years before something like this happens again."
