The club has confirmed: “The policy of the ground is that no supporter wearing another Premier League or Championship shirt is allowed into the home end. If someone comes in wearing a coat and later reveals a shirt which breaches the rules the steward response team are instructed to ask them to leave.”
A West Ham fan who did not want to be named said the supporter covered up early on and only revealed his replica shirt later.
A club employee added: “Individuals wearing other club shirts will be removed, I guess the lesson here is to report it to a steward on the night.”