With such a premise, you can usually imagine how these fight usually goes, she gets beaten, she gets cut, then her opponent gets murdered, it's quite feticistic and the author seemed to love boxing in this sort of context

Gosukon by author Fuyu Naga is a manga about a girl called Hamada Ari who wears Gothic Lolita clothes, which somehow finds herself involved in various boxing matches, she's meek and weak until she sees her own blood at which point she transform into a bloody thirsty demon

I forgot to add, Ayane High Kick does have a manga but it's very hard to find as very few copies have been produced, it's also a bit different both in style and tone from the anime, some pages

おっぱい = Tette

From the Final Chapter of the Manga "Ultra Red"

Added Ring Ni Kakero 2 to my list (pages took from @Kevmuella90 account who i hope won't mind)

Forgot to post this scene from the manga "it's time for torture, princess!" Despite the gruesome title it's actually a pretty wholesome manga

The author of Aharen-san being suspicious again in Seikai Sefuku

this is a repost, but i'm putting here to remember it, perhaps i should extend the list and include more "contact sport" pages even when they don't exactly fit boxing Mikadono Sanshimai wa angai, choroi Chapter 32 (the actual fight starts some chapter early)

From the Manga Maiwai

From Moonlight Act (not sure which is the correct chapter number)

From Hentai Doujin Purupuru Monzetsu License (this one is a bit gross for my tastes)