STORY: Novak Djokovic is set to miss more

U.S. events if he stays unvaccinated

The Transportation Security Administration

has announced tightened requirements

Foreign air travelers are required to

be fully vaccinated to enter the U.S.

Djokovic could miss Indian Wells,

which runs from March 6-19

and the Miami Open, which

runs from March 20-April 2

They're two of the most prestigious

events outside of the grand slams

The vaccine requirement is in place until April 10