Liverpool manager Rafael Benitez has said he will be without midfielders Yossi Benayoun and Albert Riera for "three to four weeks".Both sustained muscle injuries during the 2-2 draw with Birmingham. [LNB]Striker Fernando Torres, who is receiving treatment on a groin injury, was "doing well" and expected to be running in a "few days". [LNB]It was predicted Steven Gerrard, also recovering from a groin injury, would be in full training in a few days. [LNB]"It was good to have Steven Gerrard back on Monday night," Benitez told Liverpool's website of his captain's substitute appearance in Monday night's draw at Anfield. [LNB] Two more bite the dust. I think they need a new training regime! Crazy Horse "He is feeling okay and should be training fully with the other players we have here in a few days." [LNB]Daniel Agger (back) was due to be training again by the end of the week, while Glen Johnson (hamstring) could be available in a week. [LNB]Right-back Johnson withdrew from the England squad to face Brazil in Qatar because of a slight injury. [LNB]Benitez said: "Glen Johnson's was a strange situation because he finished the game on Monday and then travelled to London to be with England. [LNB]"He felt something in his hamstring and came back to us for a scan. Hopefully it's not too serious and he could be available again in a week."[LNB] Both players are wingers as well and for them to be out at the same time is bad news for us Rafael Benitez News of Benayoun's injury will be a major setback to Benitez as the Israeli has been one of the club's star performers in what has been a poor start to the season. [LNB]"We are disappointed because there are too many things at the moment that we can't change," said Benitez. [LNB]"Both players are wingers as well and for them to be out at the same time is bad news for us. [LNB]"Sometimes a break comes at a bad time because you don't like to see your players flying all over the world, but this time it gives us a chance to get some players back."