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Christian Josef Dummer
Christian Josef Dummer is the head instructor at Groundfighter Straubing, a Brazilian Jiu-Jitsu academy in Straubing, Germany. 2 competitors in the JiuJitsuGyms database list the academy as their team, and between them they hold 1 championship title (1 IBJJF Open). This profile was built from the IBJJF academy directory, where Christian Josef Dummer is registered as the academy's responsible instructor. Instructors can claim this profile to add a full bio and photo.
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