10 minutes on the clock, 38 teams to guess.
Remember to tweet your scores @FourFourTwo and share with your friends - get the United and City fans you know on board.
There are quite a lot of trophies in cabinets over in Manchester. And those are just the ones Ryan Giggs won.
Combined, Manchesters United and City have won 26 league titles and more cups than you could shake a stick at. They've both ruled England - at one time or another - and both have been victorious in Europe.
So since it was the derby yesterday, we're asking you how many of their victims you remember.
Together, they've put a number of clubs to the sword over the years and we want you to name them all. Yes, even the Club World Cup side from 2008. Yes, especially that Cup Winners' Cup from 1970. Good luck!
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