Manchester City striker Sergio Aguero is in Italy for treatment to a hamstring injury.

Aguero missed City's 3-0 win over Watford in the FA Cup third round today after suffering the problem late in the 3-0 win over Stoke on New Year's Day.

Manager Roberto Mancini initially said he hoped to have to his joint top-scorer back for next weekend's trip to Arsenal, but that now looks doubtful.

"The studies confirmed I have a torn muscle," Aguero wrote on his Twitter account tonight. "We have to keep on thinking positive and try to recover in the best way possible.

"For that, I've travelled to Italy where a specialist is treating me. I'll keep you up to date in how the injury evolves."