Schalke coach Felix Magath remains hopeful of keeping hold of goalkeeper Manuel Neuer.
The Germany No1 has been linked with Liverpool and Manchester United.
"There is no doubt I am confident about keeping Manuel Neuer, plus the rest of our key players at our club, even though it looks like future revenue could become more difficult if we are not in any European competition next season," Magath told BILD.
"We have established the requirements to end up as champions of the Bundesliga in the next couple of seasons.
"Everyone knows that a world-class shot-stopper like Gianluigi Buffon once stayed at Juventus, even though Juventus were a second-tier club for one season.
"I have an obligation to show Manuel Neuer that he has a good future at the club.
"Just looking at the current Bundesliga table, Manuel Neuer would not be playing in the Champions League with Bayern Munich next season."
