Who did Andrew clake beat up in the Breakfast Club?

In "The Breakfast Club," Andrew Clark, played by Emilio Estevez, is depicted as a wrestler who struggles with the pressure to conform to his peers' expectations. During the film, it's revealed that he had previously bullied a student named Brian Johnson, which is a significant part of his character's development. However, the film primarily focuses on the characters' interactions during their Saturday detention rather than specific physical confrontations.