Manchester City were left counting the cost of their Europa League defeat at Sporting Lisbon after losing influential captain Vincent Kompany to injury.
The Belgian limped off after just seven minutes of the 1-0 last-16 first-leg loss at the Jose Alvalade Stadium and will definitely miss the Barclays Premier League leaders' trip to Swansea on Sunday.
"I hope that for Vinnie, the injury will be short," Mancini said. "When you have a calf (injury), it can be a big problem. I hope he can recover in 10 days, two weeks maximum. We will see how it is in another one or two days."
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