Nikola Selakovic said there is nothing like good or bad terrorism and that his country supports India's position on the fight against terror.
The country's Olympic-returned boxers will also have to compete and claim gold at the Nationals to be eligible for the global showpiece.
Filip Filipovic and Serbia draped the country's flag over one of the goals at Tatsumi Water Polo Centre.
A 20-time Grnadslam winner, Djokovic, had earlier expressed ambiguity over his journey to Tokyo citing lack of fans and tight Covid restrictions.
The health official said the concerned person has been isolated and four other members, who travelled with him have been sent to a facility near the airport.
It was not immediately clear what caused the incident. Serbian media reported that sporadic detonations could still be heard in the morning, hours after they started around 1.30 a.m.
Novak Djokovic beat Kwon Soon-woo in straight sets, 6-1, 6-3, in his first match at the Serbia Open in his hometown of Belgrade.
During the trial, the man admitted to the allegations of six rapes, one attempted rape, bodily harm and attempted robbery. The victims were aged between 14 and 27.
Ronaldo walked off the field moments before the final whistle after his injury-time goal was not allowed by officials.
Kosovo collects money for Switzerland players Granit Xhaka, Xherdan Shaqiri after FIFA fines them over political celebrations
Shaqiri was born in 1991 in Kosovo and left it while he was one year old while Xhaqa was born in Switzerland in 1992 in a family originating from Kosovo.
The offer is the latest twist in Brazil's new national sport: making fun of the talented but divisive PSG striker Neymar.
FIFA said Xhaka and Shaqiri would each be fined 10,000 Swiss francs (8,700 euros, $10,000) and Lichtsteiner 5,000 Swiss francs.
Celebration by Switzerland’s goal scorers sparks political debate as displaced players make presence felt.
Serbian papers slammed what they labelled shameful provocation by two Switzerland players of Kosovo origin who used political gestures.
Savo Milosevic questioned why the VAR was not used for a penalty appeal during his team's 1-2 World Cup loss to Switzerland.