Sergio Aguero will have a scan today after being forced out of the Champions League defeat at Barcelona with a hamstring problem.

It is not clear whether the injury is a recurrence of the problem which kept him out for five games last month, but he is already a big doubt for Saturday’s trip to Hull.

Aguero failed to come out for the second half of the 2-1 loss in the Nou Camp, and assistant manager Ruben Cousillas said afterwards: “It is very early to say, so we cannot yet say how long he is going to be out.

“Aguero had the injury and but for that, he would have played in the second-half. Apparently it is nothing serious, he felt some kind of pain in his muscle. It is more a precaution, but we are doing some tests to assess it.

“It will be up to the medical staff to determine the extent of the injury, so we cannot speculate.”

Cousillas steered clear of the refereeing controversies which again blighted a fine game against Barca, with both sides being denied clear penalties and Pablo Zabaleta being red-carded.

The Argentine assistant stood in for Manuel Pellegrini, who was serving the first of his two-match ban for criticising Swedish referee Jakob Ericsson in the first leg.

And he vowed that the Blues will bounce back after bowing out of two competitions in the space of four days.

“We played a very good game against a very good team, and we had chances,” he said.

“They also had their chances, but we showed our quality. It was a very difficult to do that with ten men against a team like Barcelona, but we go home happy with the performance.

“Our project is just starting, we have been here eight months and just won our first silverware. Up to last weekend, we were the only team chasing four trophies, which is not easy to do.

“We are out of two, but are still very much alive in the Premier League. The team is recovering and have been through some low times, but we are alive and we will fight for the title.”

City must now focus on chasing down Chelsea’s nine-point lead at the top by winning their three games in hand, so victory at Hull is vital: “Our biggest pressure is what we impose on ourselves,” said Cousillas. “We belong to a huge organisation who give us the means to succeed, so we know the responsibility.”