Wales manager Chris Coleman believes Swansea will not be able to resist a big-money offer for striker Michu.
Michu has been monitored by some of the biggest clubs in the Premier League and Europe following a string of impressive performances this season which have netted him 16 goals in 24 appearances.
The Spaniard moved to Swansea on a £2-million deal last summer, and Coleman says a large offer will be accepted when the opportunity presents itself, despite the club insisting the 26-year-old is not for sale.
"It won't be easy for them to keep hold of him," said Coleman. "If any player at Swansea City is performing like Michu is then the big boys are going to look, and if they want you enough they will pay the money.
"As much as Swansea want to keep him, they won't be able to say no to that. They might say he is not for sale, but everyone is for sale at a price.
"A lot of people will say he remains an unknown entity, but if he repeats what he is doing then that is when the danger will come. That is when one of the bigger teams will probably take a chance on him."
La Liga outfit Atletico Madrid have expressed their interest in Michu previously, while it has been reported Chelsea and Liverpool have also tracked the forward.