According to the Sun, a Sunderland fan posted a photo on social media, someone caught a mouse in Sunderland's away game against Manchester United a few days ago.
The fan posted: "How dirty is Old Trafford? A lady in the back of the visiting stands just caught a mouse. You can really see everything in the game here."
The Sun said that Old Trafford is no stranger to such things. In February this year, rats appeared in Manchester United vs Ipswich, when a staff member picked up the rat and took it away. Manchester United had previously found many signs of mouse movement at home, and the stadium's hygiene rating was reduced.
Manchester United beat Sunderland 2-0 in this game, and Mount and Sheshko scored, and Lamens performed well.