On his match with Inoue, he said that he's going to beat Inoue and that's what I think that he became overconfident on that time. That's just my opinion and if you think guys that it's not a sign that he's overconfident with those words, that's okay.
What do you expect Donaire to say, " I can't beat Inoue?" hehe.
Of course, he will say he's going to beat Inoue. It doesn't mean that he is overconfident but it's just the usual statement from any boxers to say that they are going to beat their opponent as was it's supposed to be.
If his statement includes, "Inoue can't harm me, Inoue is nothing, I can easily beat Inoue" we can consider him overconfident in that fight.
Right, boxer needs to be very positive and motivate himself, and picturing winning the fight. And that's why boxers predict what round they are going to beat and knock out their opponents. But it doesn't mean that they are overconfident, more of putting themselves and their mind to wi. It's a practice not only boxers, but for any sports, focusing on and approaching the fight with the expectation that you are going to win, no matter what the odds are. Unfortunately, Nonito get the short end of the stick, as Naoya makes it very easy and score a knock out.