Looks like I'm the first person to review this. It seems odd that seemingly no one has seen this (no reviews anywhere, except a few in French), and there's no information about this movie on IMDb The movie is starred by Dida Diafat, A Thai boxing champion, and it's based on his autobiography, although his character is called Ryan. So he's playing himself, I suppose. Diafat's character gets thrown in jail in France, where he learns the basics of Thai boxing from another inmate. He then travels to Thailand to study more Thai boxing, in order to become a champion. That's basically the story, but there are a few subplots and background elements such as a romantic interest, which are likely fiction. The subplots, which seem to appear, disappear and reappear at irregular intervals, are mostly in the background and don't affect the straightforward storyline too much. However, the subplots seem a little out of place and don't quite fit the movie. It would have been better if the entire movie would have concentrated on just the Thai boxing.
Diafat's climb to the top doesn't seem unrealistic, and is presumably based on fact. There are few if any fight movie clichés. In fact, the movie could have used some, like the mandatory epic final battle where the protagonist almost loses but doesn't. The final fight is very short and ends abruptly which, again, could be factual. The fights are mostly shot well, and they alternate between close shots and fast cuts, and wider and longer takes. Considering Dida Diafat was a world champion eleven times (or so I read), the movie could have used much longer shots without fearing that it would look fake.
I couldn't see anything at fault with Diafat's acting, and generally there's really nothing wrong with the movie. I just wish it would have concentrated exclusively on the training and fighting, with more longer fighting scenes.