Carragher praised Can and admitted he is looking forward to seeing the 21-year-old play against Christian Benteke and Gabriel Agbonlahor on the weekend against Aston Villa in the FA Cup semi-final.
“You want to see Can against Benteke and Ablongohor on Saturday, I think Can will always play, he has been Liverpool’s best signing,” Carragher said speaking on Monday Night Football on Sky Sports.
Can joined Liverpool from Bayer Leverkusen on a £9.75 million move this summer.
The 21-year-old joined as a central midfielder but has played most of the season as a key member of Brendan Rodgers back-three.
Rodgers was forced to use a back-four against Newcastle United tonight due to the suspension of Martin Skrtel and injury to Mamadou Sakho.
Can started in a back-four alongside Dejan Lovren for the first time this season and contributed towards the Reds keeping their first clean sheet in two games.
The Liverpool youngster has made a total of 33 appearances in all competitions for the Reds this season.