Sancho previously played for Borussia Dortmund, where he had his best footballing experience during his first spell with the team.
Borussia Dortmund's coach, Niko Kovac, has been cautious in his comments about Sancho, saying he doesn't want to be drawn into the transfer discussions.
Kehl, however, has been more open about the team's interest in Sancho, stating that the conditions for a potential deal must be right before they take any action.
He noted that the team is limited by certain options, but is carefully considering the possibility of re-signing Sancho.