Knockout is a 2000 American film starring Sophia Adella Luke as the protagonist Isabelle Alvarado, a woman who takes up professional boxing after a friend and fellow boxer is badly injured in the ring.

While upset, Carmen grows lightheaded and nearly faints, which Chuck recognizes as one of her increasingly frequent headaches.

Fifteen years later, Carmen has passed away, Belle is working as a dance instructor, and Chuck has recently taken the graveyard shift.

Mario also coaches local professional boxer Sandra "The Lion" Lopez, a mutual friend of Belle's.

At the match, boxing manager Michael DeMarco introduces himself to Belle, finding her attractive, which annoys Mario.

In the fight itself, Sandra suffers a vicious beating and knockout from her opponent, Tanya "The Terminator" Tessaro, which leaves her in a coma.

Saddened and angered by Sandra's injury, Belle takes her suggestion to heart and visits Michael at his office, where she declares her intent to be a boxer.

Intrigued, Michael schedules an appointment with boxing promoter Ron Regent to demonstrate Belle's viability as an investment.

Belle's fame skyrockets as she accrues an 8-0 record (most of them by KO) and appears on the covers of such magazines as The Ring and Sports Illustrated.

Tanya, also repped by Don King, is set to fight for the WFBA lightweight world championship, and should she win, her first title defense will be against Belle, the number-one contender.

When he asks if she wants to cancel or postpone the fight, Belle refuses, agreeing that her father would want her to "kick [Tanya's] ass and bring home the belt."

During an interview in the ring after the fight, a tearful Belle thanks God for giving her strength and her late parents for the values they instilled in her.