Chelsea in particular were keen on making a deal last month but Schalke are believed to have turned down any offers for the player. The 23-year-old’s contract expires at the end of the season, and he is currently free to sign a pre-contract agreement with any club of his choosing.
Heidel says Kolasinac must decide whether to sign a new contract with Schalke or to make his mind up to leave, or risk the situation disrupting his focus and form this campaign.
He told Sport Bild:
“For Sead it is important that he has a clear head to get to his potential. Without exerting any pressure, I told him that it was important to decide [on his future] in a timely manner”
The full-back has played 19 times for Schalke this season, scoring two goals and providing six assists so far in all competitions.