The Reds will be looking to return to winning ways as they take on the relegation threatened Black Cats at Anfield, after a disappointing loss to Leicester City on Tuesday evening.
They struggled to stop hotshot striker Jamie Vardy in that game, and he bagged his 18th goal of a goal-laden season against Jurgen Klopp’s team.
Defoe has been in decent form himself this season, with nine league goals to his name despite their struggles.
And Aldridge says Liverpool’s plan should be a simple one, stop the striker by any means necessary.
“Liverpool's job is simple; stop Jermain Defoe,” he told the Liverpool Echo.
“He's their man threat, their only real threat if we're honest. He's a goalscorer – dare I say, the type Liverpool could use at the moment.”
“They'll play for set-plays, as Allardyce's sides always do, and Liverpool need to make sure they deal with those. Simple, eh?”
Whether Liverpool can manage to stop Defoe from scoring against them though seems unlikely.
They have once again struggled defensively this season, having now conceded 34 goals in 24 games this season, the joint sixth worst record in the division alongside Everton and Chelsea.
It could be worse however, with Sunderland having conceded 47 so far, the league’s worst record, suggesting they have a chance even if Defoe gets himself on the score sheet.