Manchester - Carlos Tevez has been ruled out of Manchester City's FA Cup semi-final against Manchester United this weekend, it was confirmed on Thursday.
City manager Roberto Mancini said the Argentinian striker was expected to be sidelined for up to a month after damaging a hamstring in the defeat to Liverpool at Anfield on Monday.
"Tevez is not available for Saturday," Mancini said.
"I think he will recover in three or four weeks. It is a big problem but we can't take any risks."
Tevez limped off early on against Liverpool, dealing a major blow to City's hopes of progressing against local rivals United in Saturday's much-anticipated showdown at Wembley.