Former Fiorentina goalkeeper Sebastien Frey says Inter Milan must keep hold of Andre Onana.
Onana is a 50m target for Manchester United.
But Frey said: "Onana has had a great season, he's a great goalkeeper.
"If I were at Inter I'd keep him because he proved to be a great goalkeeper and a great leader, something that has been lacking in recent years.
"I think these are the characters that make the difference and make you win."