Partick Thistle defender Richard Foster was involved in an aggressive altercation with a fan at Somerset Park.
The Jags were defeated by Ayr United 3-1 as Lee Bullen's men ensured their Scottish Championship survival.
For Ian McCall's men, they narrowly held on to their playoff spot in fourth.
Raith Rovers had come close to overtaking their Firhill side but were denied a promotion chance after being held by Kilmarnock.
Despite being in contention for a spot in the Premiership next season, both the Thistle players and fans were less than happy at the full-time whistle.
As former Aberdeen, Rangers and St Johnstone defender Foster trudged off the park he was involved in an argument with a fan in the stands.
The exchange was caught by another Partick Thistle supporter and has been shared on social media.
Foster has to be restrained by his teammates and stewards from approaching the fan in ugly scenes.
One fan can be heard chiming in: "Do that on the park then."
