Manuel Neuer has admitted Bayern Munich would be losing their "midfield engine" if Thiago Alcantara leaves the club this summer.
The Bayern skipper has watched Thiago in action at close quarters since his arrival from Barcelona seven years ago.
Since then the 29-year-old has helped his side to as many successive Bundesliga titles - four of which have been part of illustrious doubles.
Bayern are now facing the very real prospect of Thiago moving on though, with Liverpool the favourites to land his signature.
Thiago has just a year remaining on his current contract and Bayern would rather not lose him for nothing next year.
Liverpool are keen on snapping up the midfield orchestrator for a cut-price deal this summer, while Man City are also rumoured to be keeping tabs.
Thiago could yet sign off in style by winning the Champions League in the coming weeks, with a second leg with Chelsea the first of four matches that could bring his Bayern career to a close.
Speaking ahead of Saturday's clash, Neuer said: "I hope that it won't be one of the last matches of Thiago.
"He had to undergo surgery at the end of the [Bundesliga] season [in June] but now he's back and 100 per cent.
"He's a very valuable player for us, especially in ball possession. He's very important for us. He's our engine in midfield actually."
Reports have suggested Thiago could move to Liverpool for £27m, though Bayern are holding out for closer to £36m.
Thiago is already thought to have snubbed the offer of a contract extension, and wants a new challenge in England.
Discussing his player's future, Bayern boss Hansi Flick said on Friday: “I can understand when a player is concerned. Thiago played in Spain for FC Barcelona and in the Bundesliga for FC Bayern Munich.
“If he wants to try again in the Premier League now, I totally understand. But it would be a shame because Thiago gives our game that certain something.
“That’s why I would like to have him as a coach on the team for the next few years, but that’s life.”
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