When Julian fought Chang, Chang kicked Julian in the left leg several times leaving Julian unable to walk normally, but later on Julian is seen stumbling on his right leg rather than the left.
After the fight of the opening scene, the arm of the winner is raised by the referee and the defeated fighter is picked up by his helpers in blue. When the camera cuts to the other side of the ring, this is shown again.
A thin border can be seen around the Post Production credits, indicating that the black background may not have been perfectly scaled to fit.