Eintracht Frankfurt goalkeeper Kevin Trapp refuses to have sex with fiancee Izabel Goulart if his team loses a game.
Goulart became engaged to Germany international Trapp in 2018 and is a former Victoria's Secret model.
Eintracht won the Europa League last season and are in Group D of the Champions League this term, alongside Tottenham Hotspur.
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Trapp will be in action against Antonio Conte's side on Tuesday evening and Goulart previously opened up on the details of their relationship.
She claimed per The Sun: "Kevin and I make love a lot - four or five times a week.
"But if he has played in an important game and his team loses, I can make myself beautiful, have my nails done and wear my best lingerie - and there still won't be any sex."
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The couple met during Trapp's time at Paris Saint-Germain, with Goulart regularly attending games at the Parc des Princes.
Frankfurt slumped to a 3-0 defeat against Sporting CP in their first group game but recovered with a 1-0 victory away to Marseille.
Trapp played a key role in Oliver Glasner's side winning their first European honour in over 40 years in 21/22.
He made a key save to deny Rangers winger Ryan Kent an injury-time winner in the Europa League final, before saving Aaron Ramsey's decisive penalty in the shootout.
Last summer, the 32-year-old was linked with a move to Manchester United. Erik ten Hag identified the 32-year-old as a potential backup to David de Gea.
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Trapp confirmed the interest in an Instagram post before explaining why a move didn't materialise.
He said: "There have been a lot of reports of interest from Manchester United in the past few days. It is true that there is a written offer.
"Manchester United are a world-class team and the fact that I can deal with and think about such an offer, I hope everyone understands.
"Yesterday, however, I informed the people in charge of both clubs that I had chosen Eintracht.
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"I have experienced unforgettable things here with Frankfurt and we made history together."
Featured Image Credit: Alamy & Izabel Goulart/InstagramTopics: Eintracht Frankfurt, Champions League