Who was the best world champion in 2018 in Flyweight (112 lbs) between them ? That's will always be a shame that Kosei Tanaka or Artem Dalakian didn't have opportunities to unify at 112 lbs. What's your ranking ? Personally : 1- Kosei Tanaka (WBO) 2- Artem Dalakian (WBA) 3- Moruti Mthalane (IBF) 4- Cristofer Rosales (WBC)