The latest trailer for the upcoming sports drama “Concussion has dropped. Will Smith stars as Dr. Bennet Omalu, the first person to diagnose NFL players with CTE, football-related brain trauma. The film focuses on the battles he endured with the NFL .

The film written and directed by Peter Landesman and is based on the 2009 GQ exposé “Game Brain” by Jeanne Marie Laskas. The film also stars Alec Baldwin, Gugu Mbatha-Raw, and Albert Brooks.

“Concussion” is due out on December 25th. Click play above to watch the trailer.