The Argentina international bagged his side's third goal from the penalty spot on Tuesday following strikes from Pablo Zabaleta and Edin Dezko, before limping from the field to be replaced by Carlos Tevez.

Following the victory, City assistant manager David Platt confirmed Aguero is set to miss this weekend's FA Cup third-round tie with Watford, while the 24-year-old is also a doubt for the trip to Arsenal in the Premier League the following week.

"It's bad enough, he won't play on Saturday," Platt said.

"It's difficult to assess an injury like that (and) how long it's going to be.

"Saturday he'll be out and my experience would say he'd be doubtful for Arsenal."

Aguero missed a stint earlier in the season through injury, and Platt remained cautious when estimating how long the forward could be sidelined for with this latest setback.

"There's different degrees of hamstring (injury), that's why you need 48 hours (to assess). It's not just 'it's a hamstring and this is how long it's going to be', there are different degrees of the tear that are in there.

"It's far too early, I haven't got the qualities to scan his legs. There'll be a lot of swelling in there, a bit of bleeding in there.

"We won't know for 48 hours how long it's going to be and how quick it's going to settle down. Of course it's a blow, but I think that's what you run the risk of."