Overview
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.
Plot
Nine-year-old Isabelle "Belle" Alvarado listens to a radio broadcast of the Thrilla in Manila with her father Chuck Alvarado, an LAPD patrol officer and former Golden Gloves champion. As they celebrate Muhammad Ali's victory, Carmen Alvarado, Chuck's wife and Belle's mother, reminds them that dinner is ready and that today is her and Chuck's 10th wedding anniversary, which he has forgotten.
Chuck volunteers as a youth boxing coach at a local gym, and teaches Belle to box as a form of self-defense, though he's hesitant to have her spar. After some pleading from Belle, Chuck relents and allows her in the ring, where she knocks out a boy in a match. Carmen is furious when Belle comes home with a black eye, and demands that Chuck stop teaching Belle to box. While upset, Carmen grows lightheaded and nearly faints, which Chuck recognizes as one of her increasingly frequent headaches. He implores her to see a doctor. Carmen sees many specialists, who all determine she has a malignant brain tumor and does not have long to live.
Fifteen years later, Carmen has passed away, Belle is working as a dance instructor, and Chuck has recently taken the graveyard shift. Chuck's partner, Mario Rodriguez, has a crush on Belle. Mario also coaches local professional boxer Sandra "The Lion" Lopez, a mutual friend of Belle's. Belle visits them at the gym, and Sandra goads Belle into sparring with her, to see what she still remembers from her lessons as a kid. After being knocked down a couple times, Belle grows angry and manages to knock Sandra down, to the latter's chagrin. In the locker room, the two dispose of any hard feelings, and Sandra suggests that Belle become a pro boxer. She also invites Belle to her next fight.
From Wikipedia (CC BY-SA 4.0).