Germany coach calls for an end to drama over his No.1 while Knappen search for replacements.
"I'm sure Manuel will not be affected by the renewal of this tug of war," the Germany coach told AP. "Of course, it would be good if there was an early decision.
"Sure, one would hope that it would be decided at some point," he continued. "But Manuel Neuer cannot wait long on a decision or it will affect his performance.
"Where Manuel plays in the coming season is now in the hands of the clubs."
Schalke insist they will do everything possible to keep the 25-year old goalkeeper in Gelsenkirchen, but are nonetheless looking for alternatives. High on the radar is Kevin Trapp.
Kaiserslautern chairman Stefan Kuntz was defensive but coy in his response to allegations that his club may sell 20-year-old Trapp, who is under contract until 2013 and is valued at around €4m.
"Before a club speaks with a player's agent, they should talk to us. That did not happen," he told Bild.
In addition to Trapp, Schalke are also said to be interested in Ron-Robert Zieler, whose deal with Hannover will expire next summer. He too is said to be available for approximately €4m.