Knockout, who has fought in title bouts through out his professional boxing career, claimed the WBA interim title in late 2014, with a close win over Carlos Buitrago, but has improved since then as he showed in his second bout with Buitrago. That rematch with Buitrago was Knockout's 3rd defense of the interim title with the talented Thai claiming the full version of title when he out boxed Byron Rojas in June.
At his worst Knockout can look a bit clumsy, a bit stationary and a but lazy in the ring, with his style being a fairly rigid one. Thankfully though it does seem, fight by fight, that he's improving and is becoming a more rounded fighter, taking lessons from every fight he has. That doesn't mean he's a totally rounded fighter but he is one that is showing real improvement. His guard is strong, his footwork is very under-rated and his hands, whilst not concussive, are heavy. Given that he's fighting in Thailand he's also well adjusted to the Thai conditions, has solid stamina, even in the humidity of The land of Smiles, and can step it up if he needs to late in a bout.
At his best Ono is a solid fighter, he's a tricky southpaw with nice movement, nice speed and good skills. He does however lack in terms of power, stamina and in recent fights he has began to look like a 33, soon to be 34, year old who has had a hard career. A May 2015 loss to Katsunari Takayama, for the IBF title, saw Ono impress but it would be 26 months until he would have another bout of note and was dominated by a hungry Kenichi Horikawa, who became the first man to stop Ono. Last time out Ono was being outboxed by Tatsuya Fukuhara before a headclash bailed out Ono with a technical draw.
Through his career Ono has fought numerous notable opponents. That has seen him claim wins over the Toshimasa Ouchi, Yu Kimura, Xiong Zhao Zhong and Omari Kimweri, but the most recent of those notable wins was the win over Kimweri almost 4 years ago. Added to the poor recent form is inactivity, which has seen him fighting just 3 times in the last 24 months, going 1-1-1 during that run.
At his best Ono may have given the worst Knockout a good bout, but the reality is that Ono is a faded fighter and Knockout is a drastically improving one who should be able to bully and break down the challenger, likely ending the bout in the later rounds.