Face Masks & The Tennis

https://www.coronavirus.vic.gov.au/face-masks-when-wear-face-mask

30,000 spectators at the tennis do no have to wear face masks when in the stadium and the roof is open. meanwhile everybody else has to follow the above rules.
    The virus does not know the stadium exists let alone whether the roof is open or shut.
So there you are,  30,000 people and two or three  carrying the virus but showing no symptoms sitting around chatting and sneezing and coughing everywhere
and by the end of the day thirty or forty people exit the stadium carrying the virus and proceed to spread it far and wide.

I would suggest to anybody planing on going to the tennis that they should wear a mask irrespective of whether the roof is open or shut if you value your health and the health of those around you. It is not a difficult thing to do.....or better still; don't go to the tennis. Your world will not end by you not going, but it might if you do go!

But then again, you could get hit by a bus on the way to the tennis. Odds are about the same....So stuff it just go anyway you only live once