The former Roma midfielder is in the 18-man squad and trained strongly last night.
Benitez said: "Aquilani is in the squad so he can play. It depends. The team has some players in his position now - Gerrard coming back and the two midfielders (Lucas and Mascherano) doing well, but he'll have his chances.
"We want him as soon as possible but we have to manage with the squad."