http://www.animenewsnetwork.com/news/20 ... -green-lit
If anyone doesn't know Hajime no Ippo is one of the longest manga out there with over 1000 chapters, manga about boxing
The Anime has to be one of the best out there with the pacing it has, the fights in the manga is very... draggy though with people just thinking about should they do this move or that for entire chapters without moving one bit... Otherwise pretty solid
I think there are few OVAs, 75 episodes for first anime and 25 for 2nd season called Hajime no Ippo: New Challenger
If you looking for real fighting anime/manga better check this one out instead of the big 3, has much higher budget too.