Bayern Munich face an anxious wait to discover the extent of the recurrence of a foot injury suffered by club captain and Germany goalkeeper Manuel Neuer.

Bayern said Neuer will undergo a scan on Tuesday which will reveal the full nature of the new injury to the same foot he fractured last April.

Neuer only made his comeback from that initial setback on August 26.

The 31-year-old shot-stopper again injured his left foot in Bayern's final training session ahead of Tuesday's match at Schalke and will miss the Bundesliga clash along with flu-victim Arjen Robben.

Sven Ulreich will deputise in goal against Schalke, but German daily Bild claim Neuer could be facing another operation and lengthy layoff that threatens to sideline him for weeks.