Michal B. Jordan took a real punch to the face to film a good knock out scene.
Michael b. Jordan Fought a real boxer when making the movie creed. In the video you can see him fighting Tony Bellew and Taking a real punch in the Face to get a good shot for the Knock out scene.
The Graham Norton Show.
In another video Michael B. Jordan talks about the Punch and why it was important for the movie. He mentioned that he was not really knocked out, but he was definitely seeing stars.