The talented forward, now 35, feels he did not fulfil his potential due to his approach to football
Former Italy international Antonio Cassano believes he could have been like five-time Ballon d'Or winner Lionel Messi and the world's most expensive player Neymar if he had not "ruined" himself.
Cassano enjoyed spells with Real Madrid, AC Milan, Inter and Roma, winning La Liga and the Serie A, while he also earned 39 international caps for Italy.
However, the 35-year-old – who twice backtracked on his decision to sign for Verona in the off-season but insists he has not retired – feels he did not fulfil his potential due to his approach to football.