The new Liverpool star was highly impressive in Saturday's 4-0 win over Barcelona.
Mane arrived at the club from Southampton this summer, with the Reds paying nearly £40 million for his services.
It was a move that surprised some, with questions raised about whether they have yet again paid over the odds for one of the Saints’ stars.
Mane went some way to dispelling those doubts on Saturday though, putting in a highly impressive performance in the scintillating 4-0 win over Barcelona at Wembley.
And Lallana has backed his new teammate to be a big hit at Anfield, saying he is different to what they have.
“He is different to what we have got, he is unpredictable,” he told the Mirror.
“He’s a very good addition to the squad, believe me. I think we have got loads of different player who can play loads of different positions.”
It now remains to be seen whether Mane does prove to be a good signing this summer.
His performance against Barcelona was an exciting one to say the least, with his pace and power a welcome addition for Reds fans.
If he can replicate that across the campaign and help his new side push for a Champions League place, then questions over his price tag will soon be forgotten.