People, mainly women and 2 referees, are skating fiercely during a roller derby match.
Fierce competition in the roller derby women's final match ensues.
Skating fiercely during a roller derby match doesn't imply being in a women's final match.
Just because the women are competing in a roller derby match does not mean it is the final one.
The skaters and referees are mainly women, but that doesn't mean it's a women's match.  Not all matches are final matches.  Skating fiercely doesn't mean that the competition is fierce.