Arsenal boss Arsene Wenger has revealed that midfielder Alex Hleb has been ruled out of action for four weeks after suffering a hamstring injury.
Hleb is the latest Arsenal player to suffer an injury
The Belarus international picked up the injury during the 2-2 Carling Cup draw at Tottenham on Wednesday.
Wenger told the club's website: "I think he will be out for longer than I first thought - for a good four weeks.
"You do not want to lose players in January. If you lose them for a long time, then their season can be over."
It is a bitter blow for Arsenal, with striker Jeremie Aliadiere and right-back Emmanuel Eboue also picking up injuries at White Hart Lane.
That is in addition to the loss of Robin van Persie, who broke a bone in his foot in Arsenal's victory over Manchester United on Sunday.
Wenger said: "We also lost Jeremie but that is a question of days. I think he will be able to play on Wednesday.
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"Also Eboue has done his ankle again. That is only minor too and I hope he'll be fit for Sunday but if not, Wednesday."
However, Wenger is resigned to losing Van Persie for much longer.
He added: "Ideally you would say six to eight weeks but as well it could be 10.
"That means April and you are close to the end of the season and you'll need to get back to your best level. I hope it will be six weeks but that is really optimistic."