J'onn and She Hulk were currently even, and She Hulk was avoiding punches thrown by J'onn, and trying to box him, so he wouldn't be able to have legroom to fight back.
It was currently Round 7, and MMH actually got ahead a little bit, in the match, knocking SH two times, and was hoping to score a TKO.
He wasn't as strong as She Hulk, but he was slightly quicker, and used that to his advantage, to hit She Hulk harder, and take advantage of her being a pure slugger.
He uppercuted She Hulk and finished with a blow to the body, knocking her down for a second time, but the bell saved her.