The American caught the deadly disease early, and has undergone a round of chemo.
The Serbian Tennis Federation issues strongs support for world No. 1.
The Scot believes in the vaccine, but also adds that every individual has to make their own choices.
Reigning Australian Open champion must deliver in two key areas to go deep.
"A very small majority chose to follow their own way, which kind of makes the majority look like fools," Stefanos Tsitsipas said.
The Czech legend pulls no punches in a television interview.
Federal officials are "still preparing" a case to cancel Novak Djokovic's visa, Australian media reports.
