Don’t mess with these tough sisters!

Maria and Valery Byster have been training in mixed-martial arts at Bunny’s Gym in Tennessee since they were toddlers.

While the girls love painting and gymnastics, their favorite pastime is putting their grappling skills to use, according to Barcroft Media. And like MMA champion Ronda Rousey, they are fierce in the ring.

Photos show 10-year-old Valery wrapping her legs around a young boy’s neck — putting him into a headlock and winning the round.

Another picture puts 11-year-old Maria in the ring — sizing up her opponent as she prepares to put her punches to the test.