Not Boxing but there are Padded Gloves involved so close enough for a shout out at least? From Mikadono Sanshimai

Read this manga called Ingoku Danchi and it's about a little guy who has to defend himself from super thirsty housewives who all represent different fetishes, it's hilarious

Recently learned about this manga called "the 100 girlfriends who really really really love you" and huuuuuuuuuh, this cute violence obsessed freak is hitting a bit too close at home, this is going into my list really really really fast

this manga (Nise Kioku Soushitsu No Hachiyo-San) has a punching machine scene but it's so mid, i'm debating if i should even put it in my list

from Yankee JK Kuzuhana-Chan

From Hentai Doujin Hamekoi

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

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

From the Manga Maiwai

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)

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

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