The real risk isn't with the players -- the real risk is that if you have someone (spectator, foodservice worker, officail, etc.) who's been infected, but hasn't yet shown any symptoms, they're interacting with a ton of other people in a short span in an uncontrolled way. It's a huge potential driver for community spread.

They had already announced that the tournament would be held without audiences (and presumably food service workers and so on) yesterday.

I thought I heard that "without audiences" still meant family, etc. would still be allowed onsite in the stands.