Checkmat BJJ Rotterdam

CheckMat BJJ Rotterdam is part of the international CheckMat team. Known as one of the strongest jiu jitsu teams in the world. We want to help you achieve your goals. Whether that is getting fit, increasing your confidence or becoming a champion competitor.

Checkmat BJJ Rotterdam teaches Brazilian jiu jitsu and no-gi grappling classes on two locations in Rotterdam. The Erasmus Sports Centre and the Unity99 Academy. Click here for our schedule.

CheckMat BJJ Rotterdam was born out of the partnership between De Groot BJJ & Unity99. In 2020 Daniel de Groot & Patrick van Daalen, owner of Unity99, bundled their forces to bring Brazilian Jiu Jitsu in the Netherlands to the next level.

The goal is to make as many people as possible experience the benefits of Brazilian jiu jitsu. Not only making them better at Brazilian jiu jitsu, but also through it. By becoming fitter, more confident, giving them more control, and by becoming part of a great community.

Affiliated gyms

Checkmat BJJ Rotterdam is part of team CheckMat. There are several gyms in the area with which we are closely affiliated. If you’re in their area, make sure to visit them:
 Elevation Jiu Jitsu – Utrecht
Sticks & Stones – Munster, Germany
Grapple and Strike – Bremen, Germany
BJJAA – Amsterdam, Netherlands
Lionheart Jiu Jitsu Academy – St. Niklaas, Belgium
Fennec Jiu Jitsu – Magdenburg, Germany

Our lineage

Gabriel Rollo and Thiago Abreu are two of the best jiu jitsu instructors in the world.

Both have a 3rd degree black belts under Leo Vieira, the leader of team CheckMat.

They run The House Fight Company in Brazil and several affiliated academies around the World. Their jiu jitsu is submission oriented and works both with and without the gi. Gabriel has medalled as a black belt at the Pan Ams and the World Pro. Thiago is a no-gi black belt world champion. More important: they lead by example. They inspire their students to work hard and become better people through jiu jitsu. That is what Checkmat BJJ Rotterdam aims to bring you too.


Our team consists of people with a true passion for Brazilian Jiu Jitsu and No-gi grappling.

We do our very best to make you feel at home and to help you achieve your goals.


Daniel de Groot BJJ Rotterdam

Daniel de Groot is founder and head coach at CheckMat BJJ Rotterdam. He is a BJJ black belt and is known for his submission-oriented game and outstanding ability to teach. A product of The House Fight Company in Brazil, Daniel is the first Dutchman ever to win the Brazilian championships. He’s also an ADCC trials medalist. His students are known as finishers and have won some of the biggest competitions in the country.

Daniel holds an MSc in Crisis & Security management and is a full-time jiu jitsu athlete and instructor.
Click here to learn more about private classes with Daniel


Coach Denis Savage


Savage is a gifted teacher and one of the assistant instructors at CheckMat Rotterdam. Savage is known for always giving a 100%. Not only when teaching classes, but also coaching at competitions, training and studying jiu jitsu or helping his friends and team mates.

When he’s not teaching or training jiu jitsu, he’s a high school teacher. Click here to learn more about private classes with Savage

Bart Dubbeldam BJJ


Bart is one of the most technical jiu jitsu practitioners in the country. He uses his analytical abilities to find solutions to any problem he and his students and teammates encounter. Bart is a successful competitor, both in submission only
and point-based competitions. He has won the very first edition of the Ground Force League and is an ADCC Netherlands champion.

Next to training and teaching jiu jitsu, Bart is an Econometrics and philosophy student. Click here to learn more about private classes with Bart.


Make you better at Brazilian jiu jitsu, and through Brazilian jiu jitsu. 

We believe everyone should train Brazilian jiu jitsu to experience its many benefits. It helps you build confidence, gain control and become part of a great community.