'He kills himself, I don't!' - Mario Balotelli explains why didn't reach Cristiano Ronaldo's level as struggling striker confirms he wants MLS move before retirement

The Italian admitted that Ronaldo's relentless work ethic is something he never matched, with 40-year-old still going strong with Al-Nassr and the Portugal national team while Balotelli is leaving Genoa after a dismal spell with the Serie A side.

Balotelli, whose career has seen dramatic highs and steep declines, broke through as one of Europe's most promising strikers at Inter, but has failed to live up to the hype in a tumultuous career. He did, however, win the Champions League with Inter, a dramatic Premier League title with Manchester City and has three Serie A crowns to his name. Since joining Genoa in October last year, though, he has played only 56 minutes spread across six appearances. Balotelli said he will not be staying in his homeland and instead plans to end his career in the United States.

Balotelli was asked on Rai 2 why he is not as successful as five-time Ballon d'Or winner and ex-Real Madrid star Ronaldo, saying: "He kills himself with training, I don't... He has more money!"

The 34-year-old admitted he made a mistake joining Genoa and revealed he will retire in a few years. He added: "I could have done more, but I'm happy. I thank the fans who love me, but I made the wrong choice for the type of club. It's unlikely that I will play again in Italy or Europe."

Asked if he has an idea of where he will go, he replied: "Yes, America. I will play two or three years before I stop."

Balotelli will become a free agent when his contract expires this summer, clearing him up to make a free move to an MLS club.