The heavyweight champion told the press

[Bassim]

I am wondering if my sentence makes sense in English. Would you please correct my mistakes?

The heavyweight champion told the press he had become the champion twice because he had not only fought his rivals but also his demons: depression, anxiety and violent temper.

 

[emsr2d2]

I'd probably remove "the" before "champion twice" and add "a" before "violent temper". Otherwise, it makes sense and is grammatical.