Sturridge missed much of last season, where Liverpool struggled in front of goal and endured a disappointing sixth-placed finish, ending the campaign with no silverware to show for their efforts.
Hamann told the Liverpool Echo: “It’s a massive boost to have him back, but if Liverpool are to be successful then he’s got to be there now for the next 20-30 games.
“It’s no good doing it for a couple of weeks and then being out again, because then the whole team has to change again. He has to show he can stay fit, and hopefully he will.
“It’s massive to have him available. Obviously he missed a lot of games, so we need to keep him fit – especially if Christian Benteke is going to be out."
It is, of course, a welcome sight for Liverpool fans to see Sturridge back playing again and on the scoresheet. A striker that is capable of scoring 20 goals or more in a Premier League season is going to be a big miss to any side, so Hamann's point about trying to keep the 26-year-old fit for a sustained period of time is going to be crucial to the side's chances of putting last season's misery behind them and trying to achieve some sort of success.
His two goals against Aston Villa, in the side's first win since August, were a sign of what the Reds have missed, and highlight the kind of contribution he can make to a side who have struggled for goals in his absence.
He is a different kind of forward to both Christian Benteke and Danny Ings - who have both scored twice for the club since their arrival in the summer - but has shown that the rest of the side seems to feed off his qualities.
Brendan Rodgers will be keen to protect his main forward, given his injury record, so he may miss the odd cup tie here and there to keep him fresh for the Premier League action, but if needed he could come off the bench to make an impact on games.
It has been a while since Liverpool had Sturridge available for a lengthy period, and if they can keep him fit this time, it will be interesting to see if he manages to turn their fortunes around.