Because production kept getting delayed, the shooting of Cung Le's fight scene overlapped with the actor's training for an upcoming MMA match. While filming, Jon Foo accidentally cut Le above his lip, but Le insisted they keep shooting so he could return to training as soon as possible. The blood seen on Le's face in his scene is real.
The acrobatics and pirouettes of the film have been overseen by the experienced parkour athlete Cyrill Raffaeli. The direction of everything related to martial arts and body fights of the film was commissioned by Eric Norris (son of Chuck Norris).
Nina's costume is based on the outfit she uses in Tekken 2, with slight changes.
Katsuhiro Harada (creator and producer of the Tekken franchise) was not allowed to supervize this film and has clearly stated that it has no relation to the true story of Tekken. It is simply the imagination of how some of these relationships could have been different.