"It has been crazy in Serbia, they said they were celebrated like it was New Year's Eve when we won the other day," said Paunovic. "As we are growing in the tournament, so support is growing, too."
World No1 Djokovic has sent messages while the coach used Matic's words of wisdom before their quarter final victory over USA.
"He told us to play with a cold brain and a warm heart," recalled Paunovic. "It was advice from a champion."
Serbia have also become popular with their willingness to engage with the community, proving a hit during their extended stay in Dunedin.
"We went to see the penguins," said Paunovic. "We went on city tours, to bars and shops, mixed with the people. We want to feel like we are at home ... if you feel like you are at home, you will perform better."
They also attracted a large -- and extremely vocal group of supporters for the clash with the USA -- based around the local Serbia United club. They will need similar support today, against a Mali team that has tipped over two favoured teams (Ghana and Germany) in succession. Serbia beat the Africans 2-0 in pool play but that seems an age ago.
"You only need to look at what they've done to Germany to see what they're capable of," said Spurs and Serbian defender Milos Veljkovic of Mali.
?Mali striker Saliou Guindo believes it's his team's duty to win the cup for his country.
Few can quite believe how far Mali have progressed in the tournament, especially as they qualified for the tournament only after scoring two late goals in their final African qualifier to sneak through, and their 4-3 penalty shootout win over Germany in the quarter-finals sent shockwaves throughout world football.
Only the Serbians stand between Mali and the final and the potential still remains for an all-African final with Senegal taking on Brazil in the other semifinal in Christchurch.
"It's our dream to win this competition," Guindo said.
U-20s semifinals
• Brazil v Senegal
Christchurch, 4pm
• Serbia v Mali
North Harbour Stadium, 7.30pm.