Theversatile defender has been ruled out of Serbia's EuropeanChampionship qualifiers against the Faeroe Islands and Slovenia becauseof the complaint.
Out: Branislav Ivanovic (centre) has suffered an injury blow
Ivanovic claims he will miss the next twoto six weeks - leaving him doubtful for the visit to Upton Park andthe Champions League opener in MSK Zilina four days later.
The Stamford Bridge star said: 'I came to Belgrade to see myteammates, but the back injury is such that I cannot train or play.'
Russia coach Dick Advocaat tells Premier League trio: You're rotting on the bench!Chelsea miss out on Martin Demichelis as defender vows to fight for Bayern Munich placeCarson and Upson back for England as Capello's defensive crisis bites