His treatment has provoked outrage in his native Serbia. His father, Srdjan Djokovic said his son was had been in a room guarded by police.
"This is not just a fight for Novak, but a fight for the whole world," he said in a statement released to the media.
President Aleksander Vucic said the star was a victim of "harassment", and that "the whole of Serbia", supported him.
Ok.