The Brazilian is confident that Beckham could still play at this level whilst stating that the former Manchester United man's decision will lie with his family.
"Beckham is unique in the world of football. He's very happy in Los Angeles now," Leonardo told French daily L'Equipe. "Anything can happen. His family will weigh heavily in his choice.
"Have you seen him play recently? I know him really well. If he couldn't (play at this level), he wouldn't come," he added. "He would be the first to say so. (Inter Milan defender Javier) Zanetti is 38. It's all in the mind."