You are right, policies in each country are different...
I'm sure the sporting events will continue and the whole country in the world will definitely start over again, but what they will not start is accepting the audience, as long as the vaccine has not been found, I am sure the audience will not be allowed to be present at every sporting event.
No matter if the policies in each country are different, each government has the same purpose of protecting their city from the virus. The government, which has the sports event show, will guard the event and ensure that everything set properly before the event starts. They will cooperate with the staff event and will check every people who are in the stadium because that will prioritize for now. If the event doesn't have the audience, that doesn't mean their job will easy because they need to take care of the player, the staff, and in the field, including the other rooms. If it's necessary, they will use disinfectant before and after the event.