[19] In the first phase of the tournament, Serbia dominated in the toughest Group B with 5-0 record, and then eliminated Finland and Czech Republic in the round of 16 and quarterfinal game, respectively.

[22] Simonović also represented Serbia at the 2016 Summer Olympics where they won the silver medal, after losing to the United States in the final game with 96–66.

[23] At the 2019 FIBA Basketball World Cup, the national team of Serbia was dubbed as favorite to win the trophy,[24] but was eventually upset in the quarterfinals by Argentina.

[28] However, in February 2020, Simonović was invited by new head coach Igor Kokoškov to join the national team during EuroBasket 2021 qualification matches against Finland and Georgia.

Following his retirement as a player, Crvena zvezda hired Simonović as their new assistant coach and a staff member of Vladimir Jovanović.

The home-court loss came as a bitter pill to the Red Star team, considered by significant sections of the Serbian media and fans as title favorites capable of finally ending Partizan's 12-year domestic league domination.

[32] However, Partizan, already up 2-1 in the best-of-five series, led by Bogdan Bogdanović's 36 point performance, managed a memorable overtime away win for its 13th consecutive Serbian title.

[33] Disappointed and embittered over yet another failure to win the Serbian League, members of the Red Star ultra fan group, Delije, decided to disrupt the championship trophy presentation by storming the court, grabbing the displayed trophy, and taking it back with them into the stands among a crowd of fellow ultra fans.

[34] Many others in the arena expressed visible disapproval, among them seemingly even some Red Star players who turned away and began walking off the court.

Simonović later denied trying to offend anyone with his actions, claiming he entered the stands after being asked by the game's delegate to do so and try to return the trophy on the court.