Novak Djokovic unleashed a scream as if he had just won one of his 20 Grand Slam titles.

This being the slightly less prestigious mixed doubles competition at the Tokyo Olympics, Serbian partner Nina Stojanovic broke out into a fit of laughter at Djokovic’s outsized reaction after he served out a first-round win over the Brazilian pair of Luisa Stefani and Marcelo Melo.

The contrast in personalities proved to be a winning formula in Djokovic’s first competitive mixed doubles tournament in 15 years.

The Serbians won their opening two matches in straight sets before losing to the Russian pair of Elena Vesnina and Aslan Karatsev in the semifinals. Then they had to withdraw from the bronze medal match when Djokovic picked up a left shoulder injury during a pair of strenuous singles defeats.

“I’m learning she’s very easygoing on the court,” Djokovic said. “We balance each other.”

Stojanovic, who reached the semifinals at the Australian Open and the quarterfinals at Wimbledon in women’s doubles this year, called it “inspiring” sharing the court with Djokovic.

“I’m just trying to be in the same range as he is on the court — at least with the energy,” Stojanovic said.

With Olympic medals on the line, there’s been some serious star power in the 16-team mixed doubles tournament at Ariake Tennis Park.

Most notably, the top-ranked players in both men’s and women’s singles entered: Djokovic and Ash Barty.