Martin Dubravka could quit Newcastle unless he gets a pay rise this summer.
The Geordies have been warned that keeper Dubravka has become a "major player" since his arrival as an "unknown" 14 months ago, and deserves a new deal.
And his agent Pavel Zika claims Juventus , a big Bundesliga club, plus a title challenging club in the Premier League are all interested in the keeper.
Newcastle landed Dubravka for a bargain £4.5million, but will now have to hike his salary in the summer to ward off rivals.
Dubravka wants to stay in England, and his preference is to stick with Newcastle. But his agent seems to be wanting a cut of a big transfer.
Pavel Zika: “We must mention that [he] is not only monitored by Nedved's Juventus, but there are also Premier League clubs.
"Our personal tip with my brother is that Martin stays in England. Our effort, but also Newcastle's endeavour, is to negotiate a new contract at the end of this season, as Martin came to Newcastle as a virtually unknown Czech league player, but quickly became a major player of the entire team and already has an excellent reputation throughout the English league.
“So we are gradually starting to negotiate an improved contract, but of course, on the other hand, we record interest from a number of other clubs in the English league.
"Martin Dubravka is in agreement that our goal is to prove as much as possible in England."