Schalke are counting on Juventus selling Weston McKennie in January.
The USA international is in his second season at Juve and is being linked with a move to England.
Aston Villa, Tottenham and Newcastle United are among Premier League clubs keen, says BILD.
Juve are hoping to sell for around €40m - which would mean a tidy €1m going to Schalke as part of his original sale to the Bianconeri.
Should the auction reach €50m it would mean €3m for the S04 coffers.