Alfredo Morelos was sent-off after 31 minutes of the Old Firm derby on Sunday afternoon.
The Rangers striker saw red after landing an off the ball elbow to the chin of Celtic midfielder Scott Brown.
As the two players jogged up the pitch, Brown and Morelos's leg became briefly tangled. It appeared to be a deliberate move on Brown's behalf - an attempt to antagonise the Colombian. It worked too as Morelos reacted angrily, swinging an elbow back towards Brown.
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It was Morelos's fifth red card of the season. Celtic led 1-0 at the time through an Odsonne Edouard goal.
Here's the incident.
Brown enjoyed a hearty laugh at Morelos as he walked off.
