The 25-year old joined the Reds in the summer but has hardly played because of an ankle injury but Totti knows just what he is capable of after spending seven years with him in Italy's capital.
"Alberto is an incredibly talented player, with great technique and an excellent understanding of the game," Totti said.
"He also has a powerful shot with both feet - he really is a complete midfielder.
"He is elegant and smart - these are his main characteristics.
"Potentially he is one of the best in the world.
"He has been unlucky with injuries so far but I believe he will do really well in England."