As I said above, this shocks me, but I think you are right, now I read more about it. In my business, which is film, and freelance, we have to test all the time, and show proof, and depending on where you live and local regulations, show vaccination certificates. Because we, like tennis players, are essentially super-spreaders: traveling a lot and always working with different people. In "normal" times, how often does some kind of a tummy bug or something breakout amongst the players in a tournament? Often enough. What about the tennis lifestyle and infectious disease is Wimbledon not getting?