Antonio Cassano is brutal in his assessment of his own career.

The former Real Madrid, AC Milan, Inter Milan and Roma forward, now 35, won La Liga and Serie A, and appeared 39 times for Italy, but he still never quite fulfilled his potential.

Reflecting on what he achieved, Cassano was bruising in his admission that he never fully applied himself in training and suffered from moodswings.

Antonio Cassano has given a bruising assessment of his own career at the age of 35

Cassano played 39 times for Italy and won titles in two countries but his career was unfulfilled

'I am a problematic guy, as I never know what mood I'm going to wake up in,' Cassano told Rai Sport.

'I could've been playing on another planet, but I had this issue that I didn't like training and I wanted to eat the way I felt like at the time and I ruined myself.

'I played in the best clubs in the world, like Real Madrid, Inter and Milan.

'If I'd had another head on my shoulders, I could've been playing on Mars. I'd be like Lionel Messi, Neymar and few others.'

Cassano says he could have been as good as Lionel Messi had he applied himself

Meanwhile, Cassano - who twice reneged on his decision to join Verona in the summer but does not consider himself retired - has slated the standard of Italian league football.

'Francesco Totti and I, we used to play in the streets, running between parked cars to get the ball. Today, it's all so organised and planned out, everyone with their iPads and video games. Football mustn't be a hobby for those in this profession, but a passion and joy,' he said.

'I see a real downturn in Italy, as there's just organisation and no talent. Serie A games bore me, I prefer to watch guys down the park.'