Manchester City's new signing Martin Demichelis will be out for up to six weeks with a knee injury, the Premier League club announced on Friday.
The 32-year-old Argentine centre-back only arrived from Atletico Madrid on Sunday.
After injuring himself in training, he underwent a scan that revealed ligament damage, but a statement on the City website said that surgery would not be necessary.
"A knee injury sustained in training is set to keep new arrival Martin Demichelis out for around six weeks," read the statement on www.mcfc.co.uk.
"The club doctor confirmed a scan last night (Thursday) revealed ligament damage, but that surgery is not required."
Demichelis's absence adds to manager Manuel Pellegrini's problems in defence, with captain Vincent Kompany currently sidelined by a groin problem and Micah Richards unavailable due to a hamstring complaint.