Agent Claudio Pasqualin believes Inter Milan have pulled off a coup in Davide Frattesi.
The Italy midfielder has joined Inter on a season-long loan with the option to buy from Sassuolo.
Pasqualin told TMW: "We spent the summer talking about Frattesi and that says a lot.
"He will prove to be a good player but they probably don't know him abroad. But Inter have done an excellent operation with the purchase of him.
"He's the best buy on the market."