Strasbourg star Martial Godo sparked a huge brawl after their 4-0 win over Mainz to progress to the Conference League semi-finals.
The French side were 2-0 down after the first leg, but produced a stunning comeback in front of their own fans to progress.
Winger Sebastian Nanasi put them in front in the first half, before Abdoul Ouattara levelled the aggregate score for Gary O'Neil's side.
Former Brighton forward Julio Enciso made it 3-0 on the night on 69 minutes, before he assisted Chelsea-bound striker Emmanuel Emegha to complete the comeback and make it 4-0.
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After the match, Godo celebrated by taking off his shirt and placing it over one of the corner flags, before ripping it out of the ground.
That didn't go down well with the Mainz players, with the incident happening in front of their away supporters.
Midfielder Nadeem Amiri charged into Godo and elbowed him in the back of the head, which prompted a mass brawl involving around 15 players and staff.
Godo and another Strasbourg player appeared to be pulled to the ground during the heated exchange, which stewards and officials had to race in to break up.
It took around a minute for tensions to be calmed, with Godo having to be held back by security.
A member of the crowd then threw what appeared to be a plastic bottle in the direction of Enciso, who was also remonstrating with an official by the side of the pitch. The bottle was kicked away by a member of the Mainz staff.
When the tensions were cleared, former Fulham and Wigan winger Godo was booked for unsportsmanlike conduct, while Amiri was shown a straight red card for his actions.
UEFA are yet to comment on the brawl and it remains to be seen whether any further punishments will be handed out by European football's governing body.
Strasbourg will face Spanish side Rayo Vallecano in the Conference League semi-finals, while Crystal Palace face Shakhtar Donetsk in the other tie.
Topics: Europa Conference League
Ryan Smart