[BostonCard]

COTree, I agree with you that tennis (and golf) are probably the safest sports in terms of risk of transmission during the activity itself because they are intrinsically physically distanced and outdoors.  However, I think this discounts the risk attendant to all the non-competition related activities that are part of these contests.  One of the strongest correlations to infection risk is distance from home.  Obviously, there is nothing intrinsic to physically being 1000 miles versus 100 miles versus 10 miles from home.  However, if you are 100 miles from home, you probably are not eating your meals at home; if you are 1000 miles from home, you are probably not sleeping at home.  This was a good piece from the Economist:

https://www.economist.com/graphic-detail...re-working

We found two ways that lockdowns suppress R. First, reducing trips to work helps, as do fewer outings to restaurants, bars and shops, though the effect of those leisure settings may vary a lot. (Usage of parks or public transport had no impact, perhaps because visitors are outside or wearing masks.) Second, lockdowns deter people from travelling to other local authorities. This is probably the most important factor in decreasing R overall.

Thus, participating in a tennis tournament that takes athletes out of Santa Clara county or brings outside athletes into Santa Clara county, is probably a bad idea.

BC

[BostonCard]

COTree, I agree with you that tennis (and golf) are probably the safest sports in terms of risk of transmission during the activity itself because they are intrinsically physically distanced and outdoors.  However, I think this discounts the risk attendant to all the non-competition related activities that are part of these contests.  One of the strongest correlations to infection risk is distance from home.  Obviously, there is nothing intrinsic to physically being 1000 miles versus 100 miles versus 10 miles from home.  However, if you are 100 miles from home, you probably are not eating your meals at home; if you are 1000 miles from home, you are probably not sleeping at home.  This was a good piece from the Economist:

https://www.economist.com/graphic-detail...re-working

We found two ways that lockdowns suppress R. First, reducing trips to work helps, as do fewer outings to restaurants, bars and shops, though the effect of those leisure settings may vary a lot. (Usage of parks or public transport had no impact, perhaps because visitors are outside or wearing masks.) Second, lockdowns deter people from travelling to other local authorities. This is probably the most important factor in decreasing R overall.

Thus, participating in a tennis tournament that takes athletes out of Santa Clara county or brings outside athletes into Santa Clara county, is probably a bad idea.

BC