This might drive you mad.
Four footballers have played in the Manchester derby, the Merseyside derby and El Clasico. Can you name them?
So, that’s four players have been involved in the games between Manchester United and Manchester City, Liverpool and Everton and Barcelona versus Real Madrid.
You have five minutes to name them.
Good luck, and let us know how you do. (If the quiz does not display properly, just click here).