Crystal Palace supporters vandalised their own team's coach after mistaking it for the one used by Saturday's opponents Middlesbrough.
Fans spraypainted the words "Crystal Palace FC" on the side of the vehicle while it was parked outside a nearby hotel on Friday.
But the coach was Palace's, and those responsible for attacking it may have been confused by the fact that the players were staying at a hotel often used by away teams visiting Selhurst Park.
News of the vandalism was reportedly tweeted by Palace assistant head groundsman Dean Waters, who later hid tweet that read: "£40,000 worth of damage on our coach thinking it was the Boro coach.