Where most monks are taught in the cushioned comfortable world of the monastery you were trained in the ring. A place of blood sweat and tears. Every fight had bets and plenty of danger came your way. 

it’s up to you and your DM to decide the legitimacy of your fighting ring. Perhaps you were part of a underground fight club, or maybe you were a legit and clean fighter with no illegality to your name 

Eye on the prize

Starting when you choose this tradition at 3rd level, you can learn to shrug off pain and hold out till you last breath .

As a bonus action on your turn you can spend a ki point to gain temporary hit points equal to 1D10+ your wisdom modifirer

Fancy Footwork

At 6th level, you gain the ability to cripple your enemy and then quickly dodge around . When a enemy fails your stunning strike save you can move yourself or the enemy 5 ft in any direction without provoking opportunity attacks 

Glorious Knockout

Beginning at 11th level, you can fuel your fights off of the praise and adoration of the spectators at the glorious defeat of your opponents. Upon reducing a enemy to zero hit points you can gain advantage on you next attack role 

Manic Punches

At 17th level, you gain the ability to Release a torrent of wild manic punches. When you hit a creature with a unarmed strike and activate your flurry of blows add another attack