Arsenal midfielder Gilberto Silva has conceded the side are missing Thierry Henry.
Henry has missed Arsenal's last eight games as he struggles to shake off a hamstring-related problem.
The Frenchman was badly missed in Saturday's defeat to Sheffield United and Gilberto has admitted they are struggling without their skipper.
"It's important we get Thierry back," said Gilberto.
"We miss him. We know how important he is for the team because he's the leader of the team.
"We've done the best we can without him but, of course, we need him up front. I hope after the next game he will be back.
"We've a lot of important players injured. We try to do our best without them, but sometimes it's hard.
"Our away form concerns us. The Champions League will be a fight because we are close to each other - Arsenal, Liverpool, Portsmouth and Bolton."