On the basis the players are tested and there is 22 + the ref. I'd say it is low risk. If one had the virus it would be an issue so Sunday league isn't going to start anytime soon but professional clubs could do this pretty safely.
There is still an inherent risk which has consequences far outweighing the need to take at this stage.
True but this is all avoidable. My point was that transmission is via surfaces and lots of contact involved. 3 hours in a busy pub would be way more risk than 3 hours at a football game where you avoid touching things. 3 hours in your supermarket is likely much higher risk. It all comes down to surface contact - much less to do with the density of people in any specific area.