Jose Mourinho has ruled Loic Remy out of Chelsea’s trip to Manchester United on Sunday but says there is a slight chance Diego Costa could make the Old Trafford clash.

Costa aggravated a hamstring injury while on international duty with Spain and was hospitalised with a viral condition earlier this week.

Remy pulled his groin in the 6-0 win over Maribor to leave Mourinho short of options up front with Didier Drogba and a fit-again Andre Schurrle potential choices.

Blow: Chelsea's Loic Remy is substituted by Didier Drogba after sustaining an injury

However, Mourinho is giving Costa until the very last minute to prove his fitness before settling on his sharpshooter for this weekend.

Mourinho said: "Diego has a chance, he has a little chance.

"Remy, no chance. Diego a little chance, the same as Mikel and Ramires. The only one I can confirm has no chance is Remy."

Option: Didier Drogba

"Everything happened to him. He was obviously injured. That was the hamstring.

"Then he had to go to hospital with the viral situation that we didn't manage to resolve without being in hospital over one night. That was before Maribor.

"Against Maribor he wouldn't have been ready from the injury, no chance. But being ill didn't help the process of his recovery because we didn't want him at Cobham.

Fighting to be fit: Diego Costa

"So the medical staff had to go to his house because we didn't want to bring him here with viral situation. Today he trained individually but not yet with us.

“I'm not saying he can play. I'm saying we're trying. We will see what happens by Sunday. Remy has no chance, Diego has a little chance."

Costa is Chelsea's leading scorer in the Premier League this season.