He has faced the Liverpool striker at international level and has first-hand experience of trying to contain the Uruguayan.
So how do you stop a player like Suarez? Mascherano said: "I don't know. I have had some chances to play against him - Argentina against Uruguay. And he's really difficult to stop.
"He has a good character. He is the right player for Liverpool because it is not just about being top quality, which he is.
"He also has a lot of character and is an important part of what Liverpool , under Rodgers, are achieving.
"He is one of the best strikers in the world, one of the top five.
"So you can see that I rate him very highly.
"For me, Liverpool have a key player, a fantastic player in Suarez.
"He is unbelievable. At times unstoppable - a really great player for Liverpool and for his country."
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