Schalke have threatened legal action against Bundesliga rivals Bayern Munich, if it transpires they already have an agreement with their star Manuel Neuer.
The German international goalkeeper has 18 months left on his current deal and he has now revealed that he will not be penning a new deal during the forthcoming winter break.
Speculation is growing that Bayern have lined-up a deal for Neuer to replace their current veteran number one Hans-Jorg Butt.
"If an agreement does exist between Manuel Neuer and Uli Hoeness (the Bayern Munich president), that would be a serious and illegal matter," Schalke president Clemens Tonnies declared.
"If that was the case then we would take action."
Schalke coach Felix Magath has insisted that he fully expected Neuer to see out his contract, but the keeper himself admitted he could not guarantee that.
"I cannot say the same thing," said Neuer, referring to Magath's claim.
"There are always two sides to every story.
"There will be no present for the supporters before Christmas.
"I will not give in to pressure."