Chris Wilder has slapped a ban on Boro players swapping shirts with Cristiano Ronaldo and Manchester United stars.
The Middlesbrough squad are on a warning not to go celebrity-shirt-collecting on the Old Trafford pitch in the FA Cup on Friday night.
Wilder wants his stars to make it “dangerous” for Ralf Rangnick’s side and says they are not on a “sight-seeing tour”.