Crystal Palace expect offers in January for captain Marc Guehi.
Guehi, 23, has been integral to the Eagles' back line since he joined from Chelsea in 2021.
Manchester United are watching the stopper ahead of the January market.
South London Press says United are pondering a 50m move for Guehi over the New Year.
However, they will have to overcome Chelsea, which hold matching rights on any offer Palace accept for Guehi.