Former Fiorentina coach Cesare Prandelli has no doubts about the potential of Federico Chiesa.
The Italy attacker has been linked with Manchester United and PSG.
Despite his club sitting in 13th place in Serie A, Chiesa has enjoyed a strong season for La Viola, scoring seven goals and providing five assists in 26 games for the club.
"He must persevere and work in a single direction," Prandelli told La Nazione. "I speak of the role, his role.
"Chiesa must specialise in what he feels is his natural tactical position. If he does this, he will become the best player in Europe."