Vialli also says Papu Gomez is among Europe's best performers.
“I love them as a team and I would have loved to play there," Vialli said. “They have a style of play that involves you, you score a lot of goals, you make an effort, and you have fun.
“The Bergamaschi play with that spirit that I like: adventurous and courageous.
“Papu has improved over the years, he has become a complete player. He makes the quality and quantity to change the games. He solves them, he wins them.
“Fantastic. But there's [Lionel] Messi, [Cristiano] Ronaldo, Neymar, [Robert] Lewandowski and you'll say, oh well, I would award Gomez the Ballon d'Or, but not giving it to any of these is difficult."