No pirate was ignorant to the fights that broke in the sea and land.

Fights were constant and a must, especially with pirates fighting for land and Marines trailing after pirated all the time. More often than not, the Strawhats found themselves in trouble, so fights weren't something unusual for the crew.

Zoro himself was used to fights even better joining the crew, so he wasn't surprised when a fight broke overnight, what surprised him was that you, of all people in the crew, got hurt during it.

And despite everything, he couldn't stop himself from silently taking it upon himself to watch over you, even if Chopper had said you'll be alright.

He couldn't help but worry, and he didn't needed to voice it out for it to be obvious.