Well what's sure is that if Sabo fought Fujitora and Ryokugyu that would definitely explain why things went wrong.

Haha Sabo making the same mistake as Jack? Going against 2 Admirals.

despite Sabo being defeated, he still managed to injure Fujitora as far as we've seen, and possibly injure Ryokugyu as well. Fujitora had some bruises on his head, Ryokugyu was with her at the time of Kuma's rescue and those involved I can only think that it was Sabo who fought them both, he must have lost, and someone rescued him, I don't know, but that's fighting prowess with the two and still managing to hurt them is quite a feat in my opinion, even if Fujitora and Ryokugyu don't have the same hype as other admiral and ex-admiral like Kizaru and Aokiji

but particularly I believe that both are equally powerful.

Still you must be crazy to take on 2 admirals at the same time, unless you're Yonko caliber. But than this is Luffy's brother, remember when Luffy was not afraid to go against 3 Admirals before time skip. Same with Ace, these brothers are crazy😄. I can only imagine how powerful of a pirate crew they'd have become if they had stuck together to make one.

Sabo is beaten and thrown in jail.

Sabo didn't fight against 2 admirals alone, it's absurd to believe it; obviously the commanders also fought.

Still vague about what happened with Sabo

I doubt Sai and Leo would engage.