In addition to Novak, the surge of popularity for tennis in the country also centered around three more up-and-coming young players: twenty-year-old Ana Ivanovic, twenty-two-year-old Jelena Janković, and twenty-three-year-old Janko Tipsarević as evidenced in early December 2007 when a sports-entertainment show named NAJJ Srbije (The Best of Serbia), put together in honour of the four players' respective successes in the 2007 season, drew a capacity crowd to Belgrade's Kombank Arena. In May 2008, he was a special guest during the first semi-final of the Eurovision Song Contest, held in Belgrade that year. He threw a big tennis ball into the crowd, announcing the start of the voting and together with one of the show's co-presenters, Željko Joksimović, Djokovic sang Đorđe Marjanović's song "Beograde".