Thilo Kehrer's anticipated move to Paris Saint-Germain remains subject to the agreement of personal terms, according to Schalke sporting director Christian Heidel.
The 21-year-old defender has been poised for a switch to the Ligue 1 champions since Schalke accepted a reported €37million offer.
Kehrer, who made 28 Bundesliga appearances last season, had agreed a new contract with Schalke prior to PSG's approach.
"Kehrer's transfer to PSG is not yet complete," Heidel told reporters on Wednesday.
"The contracts are still to be signed and he still needs to sort his personal terms."
"We have a very good squad, a good mix," he said.
"Even without Thilo, we have a total of five options for [the back three], so if we play a back four we only need two centre-backs."
