Hamburg have suspended Slobodan Rajkovic and sent him to train with their reserve squad after the defender was involved in a training-ground altercation with team-mate Heung-Min Son.
The Serb squared up to the 20-year-old South Korea international during a training match and, following an exchange of blows, was immediately sent from the pitch by coach Thorsten Fink.
Rajkovic, who only completed a permanent move to the Imtech Arena from Chelsea last summer, has been suspended following the incident, and has also been told he must train with Hamburg II for the foreseeable future.
Tolgay Arslan, another player at the club, suffered a cut, as he was sent flying to the ground while trying to break up the scuffle between his two team-mates.
It is not the first time Rajkovic has been caught up in controversy. Back in 2008, he was suspended from football for a year by Fifa after spitting in the face of referee Abdullah Al Hilali during Serbia's 2-0 defeat to Argentina in a group match at the Olympics four years ago.