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