Holly has a weird footwork thing where she'll only punch after getting herself standing in a certain position. In the fight against Sophie, she got battered everytime she assumed that position.
Holly is left-handed and fights from a southpaw stance - right hand and right foot forward - which is the opposite way round to an orthodox boxer like Sophie.
In a fight between a leftie and an orthodox boxer, each will be trying to get their lead foot outside the lead foot of the opponent, to bring him/her into line for power punches with the back hand - right hand for the orthodox fighter, left hand for the southpaw.
While this is going on, it's always the southpaw who looks awkward and out of position, simply because we are not used to seeing boxers fighting from that stance.
Sophie won that tactical battle, which is why she couldn't miss Holly with those big right crosses and uppercuts she was throwing