Not sure if this was posted last year when it came out but I am 3 parts in to this brilliant doc series on the era of Leonard, Hagler , Hearns and Duran.

It's on the Discovery Plus channel - you can take advantage of the 7 days free trial to watch it (4 x 1 hour episodes)

https://www.imdb.com/title/tt14442878/?ref_=fn_al_tt_1