That's why king doesn't give to much about his sword...
His wings are way better...
So sanji didn't pay attention to king ?
The way i read this panel it looked like sanji wanted momo to feel ok..
And yes he was outspeeded and overpowered to the point that he didn't knew if momo was ok afterwards..
Even blocking a base kick from king was enough to make him uncomfortable..
Maybe oda did all this mixing with kaido vs zoro and sanji vs king for the fans to realise something...
I am just saying...