Athletes ages eight (8) years and older in good standing with the US Open and the supervising sanctioning entity (not under medical or disciplinary suspension, etc.) may compete in the US Open.

United States citizenship is not required.

Memberships or affiliations with external federations or associations are not required.

The Official registration site is managed by the Kihapp tournament management platform.  The Register button at the top this site will redirect you there. 

Most things!  Know OUR definition and be honest.  We hire an investigator to vet each registrant and they are true wizards.

Per our Official Rules:

“Bout/Exhibition: means any demonstration of technique or training in unarmed combat, which is attended by members of the public, including any such demonstration involving the sale of tickets or collection of admission fees. Please be advised that some exhibitions described as being “light contact”, “modified contact”, or “point” style may still qualify as a “bout”.

Reach out to Support  if you are unsure if certain experience counts as a bout.

Hit the registration button for either the US Open or Class-D tournaments to register as a coach. DON’T REGISTER TWICE – A registration for one will automatically grant you access to the other. 

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Yes, we allow you to change your weigh division or experience class.  We call them “transfers”.  Depending on the timing of your request there may be a fee (below).  Contact us via Support. 

• Requests received within 48 hours of registration: FREE
• Requests received one month prior to the initial weigh-in: $15
• Requests received within one month of the tournament: $25
• Requests received within seven (7) days of the initial weigh-in: $45

• Requests received on the day of the initial weigh-in: $75

• The Class-D transfer fee shall be a flat fee of $10 per request

In general, US Open entry fees are non-refundable. However, you may receive a refund of your registration fee and optional add-ons (excluding the Registration Protection Fee) under the following circumstances:

• You are the sole registrant in your weight class and cannot be matched or transferred.

• You are competing in the Novice, Intermediate, or Open Classes (ABC) and you opted in for Registration Protection at the time of registration and requested a refund at least one month before the initial weigh-in.

• (Rare situation) The US Open Organizing Committee decides, at its discretion, that a refund is in the best interest of the event.

• Class-D, Elite Fees are non-refundable except if you are unmatched. Coach Registration i Fees are non-refundable.

Mmm Hmm.  Check it out:

US Open Strikes Quick Reference

Basically, the differences between Class-C and Class-D (Development) involve experience limits, target areas, and equipment. Class D is perfect for people who have trained for a few months and would like to ease into the competition setting.  Class D allows athletes to focus on technique and strategy without concern for getting hurt.  Each athlete will receive post-match feedback on their performance.

Class-D-Guide

Q: What size gloves will I be wearing?
A: Glove size is determined by weight:

• 146 lbs. or less: 10 oz. gloves.
• 147 lbs. or more: 12 oz. gloves.

All competitors must use US Open® Officially Licensed gloves. (Available for purchase on site)

Q: What are the requirements for head protectors?
A: Head protectors are mandatory and must be open-faced—they cannot have features that protect the nose, cheeks, mouth, or chin.

Q: What medical documentation do I need to provide? A: All athletes must pass a physical exam certified by a Licensed Medical Doctor. Additionally, competitors aged 16 and older must provide lab results showing they are negative for Hepatitis B, Hepatitis C, and HIV.

Q: Are there specific pregnancy screening requirements?
A: Yes. All female athletes aged 15 and older must undergo an hCG urine pregnancy test, which the US Open provides free of charge.

Carefully (slowly) read the instructions on medical forms.  The sanctioning entity will not bend the rules.   

We may offer on-site bloodwork interpretations for an extra fee, but it depends on our doctor’s availability. 

We prioritize safety with strict pre-fight medical checks, ringside medical professionals, and competition safety gear. Muay Thai comes with risks but our goal is to ensure a safe environment for all participants.

Yes, under the “Underdog Provision,” exceptional Novice or Intermediate athletes may choose to compete in a more advanced amateur class, provided they declare they accept the increased risks. However, no athlete is permitted to compete in a lesser class than their experience dictates.  You CAN compete in multiple divisions, but you will have to pay a separate fee.  Be careful though, a medical suspension will DQ you for all remaining bouts. 

A: For most adult classes (A, B, and C), bouts consist of three 2-minute rounds with 1-minute rest periods. Class D, Bantam and Pee-wee divisions use 1:30-minute rounds.

See the Official Rules for info about Judging & Scoring.

The US Open utilizes a 10-9-8 scoring system. Judges award points based on clean strikes (punches, kicks, knees, or elbows) that land on an unprotected part of the body. A score of 10-9 represents slight dominance, 10-8 represents undisputable dominance, and 10-7 represents tremendous dominance.

Event updates and announcements are posted on our website’s news section. You can also follow our social media channels for the latest information and updates.

If you’re interested in supporting our tournaments, please reach out to us using the Support link.

he US Open reviews each registrant’s application for discrepancies and false claims. We will investigate all allegations of cheating and  will initiate a disciplinary action.  If found responsible, athletes can face serious penalties including disqualification,  suspension, or permanent ban.  If you suspect cheating, report it to us HERE.

Absolutely, just pay close attention to the experience classes and register accordingly.  Contact us through Support if you need assistance.  Toggle Content