The Bayern Munich keeper has returned from injury just a month before the start of Russia 2018 and Kahn think it will be 'impossible' for him to shine
Manuel Neuer is a "gigantic risk" for Germany at the World Cup, according to Oliver Kahn.
Germany coach Joachim Low named Neuer among four goalkeepers in his initial squad for the World Cup, giving the Bayern Munich player a chance to prove his fitness.
Neuer has not played since September due to a foot injury but could be named in Bayern's squad for Saturday's DFB-Pokal final against Eintracht Frankfurt.