Three of Chang's four losses occurred after he returned from retirement due to financial issues. Three of his overall losses were also razor close... a SD in his first loss, a one point MD against Sot, & Kittikasem had to get off the canvas three times in order to land the wining blow. Humberto Gonzalez managed a UD against Chang in South Korea, nabbing 11 rounds on one judges score card... but again, this was after Chang's retirement. Would he be able to dominate a younger Chang? Who would be your fighter of choice to win by clear cut decision or over knockout?
Hard to pick as every boxers in light flyweight that I know had their own weakness that Chang could exploit,but Juan Guzman and Ivan Calderon probably?
Any light flyweight presumably? And dominate? It would need someone who could put in a masterful boxing performance as I don’t think anyone could go toe to toe with him in his prime and dominate him. His loss against Hilario Zapata, who was a cute defensive fighter, was contentious (I scored it but there was a round missing which made a difference on my card so I found it be inconclusive but definitely a close fight), would be the type of fighter who might be able to do it but in reality didn’t do it! In fact, he got dominated in the rematch. Someone mentioned Ivan Calderon, presumably for the same reasons as I mention Zapata, but I’m not convinced - I think he’d be physically overmatched. Interesting match up, though. Chiquita? No, I think he’d get drawn into a gunfight and his chin wouldn’t have held up. Carbajal? He had the power and aggressiveness to hurt Chang but was hittable himself (even though he was durable). I think I’d have to say, from what I’ve seen, probably not. Beat him? Maybe. Dominate? No.
There may be some fighters that can perhaps beat him in a competitive fight but no Light Flyweights in history would have been able to dominate a prime Jung Koo Chang IMO.
Strictly light fly? no, definitely not. I think he's the best head to head there overall. At Flyweight ( and to a lesser extent light-fly as well) there's various other greats/excellent fighters that could arguably beat him very clearly if he's out of shape and off-form (like that second German Torres fight), especially as he's an instinctive fighter (rather than a super technically refined one) that needs to be in top shape or things fragment too much and effectiveness drops a few notches quite quickly. There's also the usual list of other Flyweight greats that we can argue about depending on how you see the stylistic matchup, but the majority are likely to be competitive fights, not dominations either way. There's not much footage of the pre-Harada/Pascual Perez greats to be getting too definitive about our predictions. Post-war Flyweights, Harada is the one with the best chance to beat him clearly enough to the point that some might say it was dominant. He's very robust and tanky at the weight, but not to the point he could not have stayed longer to ensure his legacy if he'd been more dedicated himself outside the ring. So...strength advantage...similar speed and reach...shorter, more compact punches, including his great jab for easier points-scoring purpose...I'd say likely to be competitive 10-5/9-6 'ish sort of fights, but I'd make Harada the solid favourite and think he has an ideal style to take the initiative and usual advantages Chang has on other Flyweights away.
People clown on Arce sometimes but he was a real warrior in his hey-day... scrappy as the day was long and a killer body puncher too.