Zlatan Ibrahimovic appeared to elbow John Terry in the face during Chelsea's International Champions Cup win over PSG in North Carolina.
The Swedish striker was penalised but not booked by the referee, as Terry felt the full force of what seemed to be a deliberate lashing out.
Chelsea went on to win the game 6-5 on penalties after a 1-1 draw, with goalkeeper Thibaut Courtois scoring the decisive spot-kick.
Play the video at the top of the page to watch the incident