Sturridge has not featured for his club since participating in an impressive dismantling of Tottenham Hotspur on August 31 after suffering a thigh injury with England.
"It's a massive boost," Rush explained to Liverpoolfc.com. "We have missed Daniel, he's a quality player. With the international week, there's even more time for him to come back from his injury.
"You look at the game against Tottenham, when Sturridge, [Mario] Balotelli and [Raheem] Sterling played - there were goals in the three of them and they were absolutely fantastic.
"It will be a big boost to have Daniel back and hopefully get the side going again. We had a good win [against West Bromwich Albion] so what we're looking for now is to maintain that.
"I think it will be pretty normal for him - he'll get straight into it. He's a naturally fit player so I think he'll walk straight in. I don't think it will be a problem."
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