Lallana has tipped his fellow summer arrival to be a big player for the Reds for many years to come.
Can has only just started to make an impression on the Liverpool team after signing for Bayer Leverkusen for just shy of £10 million in the summer.
After making two substitute appearances earlier on in the season, Can suffered an ankle injury on international duty but made his first start for the club in the away win over QPR last month.
He has since appeared in both games against Real Madrid in the Champions League and got his first goal for the club in the 2-1 defeat to Chelsea at Anfield.
Lallana told the Liverpool website: "I remember in pre-season, when I was injured, I was out there and I was really impressed with him. He's still a lot younger than everyone probably thinks as well.
"He's a strong player, a good tackler, he's got a great engine. He can play a few positions as well, so he's going to be a great player for Liverpool moving forward."
The talent is evident and at the age of 20 there is a lot for the German to learn, and given Brendan Rodgers' track record with younger players, he has arguably the best manager he could ask to work under.
Given his age, he has experience of playing on the big stage in the Champions League during his time in Germany, as well as expectation having come through the ranks at Bayern Munich.
His versatility was undoubtedly an appealing factor as he could fit into the side in some form regardless of the shape the side takes or the game plan.
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He may not have played much so far this season, but you can already see two of his key strengths that he likes his side to keep the ball, but isn't afraid of the fight by winning challenges in the midfield.
Not much has been seen of the German so far, but he has shown he is a strong player with plenty of drive about him. If that talent is nurtured well enough, he could be a mainstay in the Liverpool midfield, like Lallana suggests.