Continuity mistake: David Sloane (Sasha Mitchell) is the brother of Kurt and Eric Sloane (shown in Kickboxer, with Jean-Claude Van Damme). In the opening scene you can see pictures of the brothers, but the Kurt and Eric Sloane featured on the photos are NOT the Kurt and Eric Sloane from the Kickboxer movie. You also see pictures of Xian and Mylee, from 'Kickboxer'. Then later in the movie, when David and Xian 'meet', David asks Xian, "Who are you?" Well, he would obviously know, given that he's got Xian's photo hanging on his wall at home.
Continuity mistake: During the Brian Vs. Tong-Po fight, Tong-Po lifts the referee onto his shoulders while wearing a pair of boxing gloves. Yet when you see the referee being thrown over the top rope and out of the ring, you see him being thrown by a bare pair of hands.