Alan Pardew has admitted that West Brom will have a tough task of holding on to their captain, Jonny Evans in January.
Evans was linked with Manchester City in the off season and Guardiola intends to buy a defender in January.
Arsenal are also interested in signing the North Ireland defender, but Pardew hopes he renews.
“I think you have to be realistic in these situations,” Pardew told reporters on Thursday.
“Jonny is a top player, other clubs were interested in him in the summer. We know that and he knows that, we have to be intelligent and straightforward dealing with it.
“He is under contract for West Brom. He knows he can have those conversations [about a new deal] with us.
“We will give him the best deal we can possibly go to on the financial side and length of contract, but that might not be the whole thing with Jonny.”