Chelsea winter signing Mykhailo Mudryk had a laser shone in his face by an Arsenal fan on Tuesday night.
The Gunners romped to a comfortable 3-1 win over the Blues at home in the Premier League.
Their fans were not too happy with Mudryk, as he was seemingly close to joining their club before going to Chelsea in January.
Sky Sports cameras picked up on an incident where the Ukrainian had a laser shone on his face.
In addition, co-commentator Jamie Carragher noticed the green light that was on Mudryk's face and said it was out of order.
British media reports later suggested the man who was responsible had been arrested.