Verratti moved to PSG last year from Pescara.
“I think Verratti is a very strong player, even if he is still very young,” Vieri told Bein Sport.
“He’s good in the defensive phase too, he has good reflexes and some very good technique.
“He has a great future ahead of him, in my opinion, and he was a great signing for Paris Saint-Germain.”
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