Roberto Mancini faces an anxious wait to discover the extent of Vincent Kompany's hip injury.
The Belgium defender has been a key component of Manchester City's defence this season but was forced off during the first-half of last night's 3-0 win over Aris Salonika.
With so many injuries decimating his squad at present, Mancini can ill afford to lose such an influential member of his first-choice starting line-up, especially with games coming every three days at present.
"We won't know what has happened until tomorrow when we see what the situation is," said Mancini.
"We have a lot of injuries at the moment, so I hope it is not serious and he will be available for Sunday."
City tackle Fulham at Eastlands this weekend as they continue their quest for a top four berth.
Whether they will throw all their big name strikers at Mark Hughes' men, as Mancini did last night, is open to debate.
Edin Dzeko profited most from the tactic, scoring twice in the opening minutes to help seal a last-16 meeting with Dynamo Kiev.
However, Mancini can see a flaw in selecting the Bosnian, in addition to Carlos Tevez and Mario Balotelli.
"I thought we did well and in the first half I was very pleased," said the Italian.
"The problem comes when we don't have the ball. If we don't close down every situation, it could be difficult for us.
"We can play this formation, but not often, unless we improve."
Dzeko's efforts doubled his previous tally since a £27million move from Wolfsburg last month.
The Bosnian should have had a hat-trick too after being sent through by Silva in the final minutes of the first-half.
However, the chance went begging when Michail Sifakis robbed him as Dzeko attempted to go round the Aris keeper and it was left to Yaya Toure to complete the scoring with a deflected effort 15 minutes from time.
Aris coach Ioannis Michalitsios was refreshingly honest as he assessed his side's downfall, even though the Greek outfit had gone into the tie level after the first leg on home soil.
"We lost to a better team," he said.
"We found ourselves two down in the first few minutes, which obviously knocked us back. Given what happened, the eventual outcome could have been a lot worse.
"In order to knock Manchester City out we needed a perfect performance and for City to make a lot of errors. That did not happen.
"City are a better team that most in Europe and the favourites to win the Europa League this season."