Motorball is a full-contact sport in the futuristic world of Earth 2563, which involves rollerblading, hockey, roller derby and more. Hugo (Keean Johnson) is a human love interest who teaches Alita (Rosa Salazar) the art of the sport – and because of her durability, she proves to be very, very good at it.
Article source: https://www.cinemablend.com/news/2485937/the-scene-alita-battle-angel-cut-and-why-fans-likely-wont-ever-see-it