Yamato is below admiral level. Greenbull is on admiral level. Yamato has no special ability that could make up the difference, so Greenbull wins.

I LOVE YAMATO! And I mean LOVE him as a character and, for the plot of his appearance ( ͡° ͜ʖ ͡°)- but he ain't beating Greenbull. People really underestimating Greenbull bc of the way he was shown off near the end of Wano. But come on, Greenbull has common sense to run away. If he wouldn't, he would have been fighting the straw hats, the red hair pirates, the 7 scabbards, Yamato, Momo, etc. Man would have no chance against these odds.

@NeteroHyouka he alr defeated her☠️💀

He sneezes and. Yamato done for

He isn’t appointed as admiral for nothing

They didn't fight...

OH REALLY?

If you remember only the samurais and momo fought....

If you remember Yamato also fought

Aramaki

Yamato was held back by Momo's word to not engage, so she probably wasn't going all out.

That being said GB would still mid to high diff her.