Wolfsburg defender Friedrich out indefinitely

Wolfsburg and Germany defender Arne Friedrich will be out

indefinitely with a back problem that requires an operation.

Friedrich is slated to undergo surgery on Thursday in Munich for

the slipped disc that could not be treated without the


It will not be known until after the operation how long

Friedrich will be out of action. Friedrich joined the 2009

Bundesliga champions this year from relegated Hertha Berlin.