Celtic could land a significant transfer windfall should Jeremie Frimpong leave Bayer Leverkusen this summer.
The Dutchman joined the Parkhead side in the summer of 2019 from Manchester City.
However, after only 18 months in Glasgow, with 51 appearances to his name, the right-back moved to the Bundesliga for £11.5m.
He's gone from strength to strength in Germany, becoming a title winner under Xabi Alonso's guidance last season, as well as a full Dutch internationalist.
This has led to a number of clubs growing interested in a move for the attack-minded full-back.
Fabrizio Romano posted on X yesterday: "Jeremie Frimpong remains one to watch in the summer.
"Dutch right-back could leave Leverkusen in the summer with many clubs interested.
"The clause in his contract is worth a fee of around €40m."
When Celtic parted ways with Frimpong four years ago, it's believed they negotiated a 30 per cent of profit sell-on clause with Leverkusen.
So, what does that actually mean for Celtic?
Well, if indeed any interested party - such as Manchester United - does trigger his release clause of €40m (£33.7m), then Celtic will be entitled to 30 per cent of the profit made by Leverkusen.
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The total profit made by the German side would come to around £22.2m.
And by our quick calculations, this would result in Celtic raking in £6.7m.
Leverkusen chief executive Fernando Carro previously admitted the club will likely sell one key player in the summer.
He said: "Every year we need to sell one big player to find budget for new signings.
"So, probably we will sell one player. We're planning to sign two or three players with that amount of money."