Here is the full list of all 37 Undisputed achievements.
Throw 10,000 upper cuts
Throw 10,000 jabs
Throw 10,000 hooks
Have your 10th online fight
Break an opponent’s win-streak of 3 or more matches
Win by KO in the 12th round
Win an 8+ round fight that has Joe Frazier vs Muhammad Ali
Win an 8+ round fight that has George Groves vs Carl Froch
Participate in an online fight for the first time
Win your first online fight.
Survive a dazed state by the skin of your teeth (Round end)
Finish an 8+ round fight by winning every round.
Finish a fight with 66% or higher accuracy (with at least 30 punches)
Customise your player card
Knock out any AI opponent on pro difficulty in less than a minute
Lose a fight due to fouls/ref stoppage (punch below belt or headbutt moves)
Get a Knockdown with an illegal shot
Win a fight after getting knocked down 5 times
Win a fight by an injury stoppage
Win a fight after having sustained a bad cut
Have your 50th online fight
Get yourself a win-streak of 5 online matches
Win at least one Prize Fight per day for 5 days in a row