Football

Hi I'm new to this site. My son was diagnosed with Aspergers and adhd at 3, his obsession used to be crocodiles then at 5 he started to play football. Football is now his obsession, he has a ball at his feet all the time and is in a development squad so is showing great potential. Over the last year we have got better at losing, last year of a goal went in we would be off the pitch now we can handle that to an extent. The problem I now have ia with fairness. If the referee makes a decision or doesn't see something my son seems to be unfair he gets frustrated and was sent off for being rude.  Has anyone else had this problem, this is probably the one thing that will stop him getting to where he wants to be. Football is the only language he understands