Manchester City's new striker Mario Balotelli will miss Thursday's Europa League playoff second leg against Timisoara because of a knee injury.
Balotelli, who marked his debut by scoring the winner from the bench in City's 1-0 away leg victory against the Romanian side last week, picked up the injury during his cameo role.
"Mario has a problem in his knee, not much of one, but he won't be available for Timisoara. It's important that we try to get him ready for the (Aug. 29) Sunderland game," City manager Roberto Mancini told www.mcfc.co.uk on Wednesday.
The 20-year-old Italian international joined City on a five-year deal from Serie A champions Inter Milan earlier this month for a fee of 24 million pounds ($37.01 million), according to British media.
"He is settling in well but he needs time. It's not easy to change clubs or meet new team mates but I know he's happy here already," Mancini added.
City have problems in defence for Thursday's match, with fullbacks Wayne Bridge, Alex Kolarov and Jerome Boateng all injured.