WATCH: 10 Biggest Mysteries In Football
Most things in football are pretty simple, Lionel Messi will score a goal, a referee will get a decision wrong and Arsenal will have a player injured. But other things, like how has Paul Merson still got a job when he can't say anyone's name right, will always remain a mystery.
Football is full of a lot of things that are easy to understand but there's a hell of a lot of things that leave us asking why or how. Here are the 10 biggest mysteries in football: