Shanks vs Kid: Kid losing his arm vs the officers of Red hair pirates, and later his failure to be allies with Hawkins, Apoo against Shanks led him to Wano where he earned 3 billion bounty, then once again he find himself failing against Shanks.
-Due to Shanks catching Kid off-guard while Kid was focused on Shanks's fleet, and making Kid's own weapon explode (its obvious as we see Kamusari sending Oden flying, but Kid didn't get send flying instead got caught in his own explosion), the fight ended very quick. In a different scenario, if Shanks didn't go all out with Kamusari + Future sight combo, the fight could be different if Kid didn't focus on destroying Shanks's fleet, still Kid would get low-diffed though.
Teach vs Law: Law the instigator of Rock port incident and become Warlord due to that incident, by stealing hearts of the 100 pirates on Hachinosu island where Teach become the boss after defeating Ochoku.
-Despite Oda showing Law catching Teach off-guard with his awakening and weakening Teach at the beginning of their battle, Oda off-panels Teach's battle once again, still we know Teach doesn't go all out as we see, the island wasn't destroyed or splitted in half due to Quake strikes, Teach won while holding back.
Aokiji vs Garp: apprentice vs master battle, Aokiji was following Garp's footsteps until his view of justice changed completely after Ohara incident.
Most of it was off-panel, then Shiryu weakened Garp, and Pizarro forced Garp to use his last remaining of his Haki, and that lead to BB Pirates defeating Garp without Aokiji vs Garp doing final 1 v 1.
S-Hawk vs Zolo: S-Hawk is literally like Dragon Ball's Cell for Zolo, stole the powers of Zolo's 3 former opponents: -Mihawk, Daz Bones and Alber. (interesting detail that, S-Hawk is missing only Shiryu's ability, which will remain special to only Shiryu)
Zolo didn't realize S-Hawk had Lunarian powers at the beginning so he misjudged S-Hawk's power level, and another of his former opponent Kaku involved in this fight 2 v 1, perhaps Awakened Kaku was defeated by S-Hawk off-panel, we could see more.
Lucci vs Luffy: former opponents from time skip, compared to other fights, I believe we see this more as it was clear that Luffy was above of Lucci's level despite Lucci's increased level and awakening that he can one-shot Sentomaru and fights equally with KOH Zolo, still wasn't enough for Luffy.
