I don't think he's bluffing. More likely he's betting on France and England relaxing the vaccination rules before the French Open and Wimbledon take place.
He refused elbow surgery, insisting instead on taking 6 months off to allow his body to heal itself. It did not, and he eventually got the surgery, which worked
LOL - he is the poster boy for quack medicine. Knows nothing about it, but thinks he does because he thinks he's special. A badly informed prima donna with little clue on anything other than bashing balls very hard with his racket. He should stick to hitting his balls hard and shut up on anything else.
...waits for the liberation LRC loons to come shouting.