A youth wrestler in Illinois was socked in the face while trying to shake hands with his opponent following a match earlier this month ... and the blow was so violent, police are now investigating.
The altercation went down at the "Beat The Streets" tournament on April 8 at Oak Park River Forest H.S. in Oak Park, Ill., where kids from ages 8-to-18 were participating in a wrestling competition.
In video of the incident shot by a spectator at the event, you can see an 8th grader from SPAR Academy and his opponent finishing up on the mat during a 125-128 pound freestyle third-place match -- when things suddenly took a disturbing turn.