Rafa Benitez admits Liverpool lean heavily on the scoring power of Steven Gerrard and Fernando Torres.
Gerrard missed Saturday's 0-0 draw with Fulham and Benitez said: "Last season it was clear to see that the understanding between Torres and Gerrard was really good and there have been signs this year that it is getting better.
"Torres is back again after being injured and we hope that Gerrard will be fit enough to face Marseille.
"As a manager I don't like to single out players. But Gerrard and Torres have scored something like 54 goals between them since they began playing together, so it is clear that they are both very important to us."