The Dallas Mavericks hosted an NBA draft party on Wednesday. Hours before the event, the nearly packed American Airlines Center reverberated with chants of “Fire Nico.” The trolling has been a consistent theme in Mavericks home games after team general manager Nico Harrison traded Luka Doncic to the LA Lakers in February.Fans promptly reacted to the viral clip.ChoZen @ChoZenKunLINKHe got you cooper flag bruh lmaoOne fan said:RipCityPac @RipCityPacLINKWeird they are set up and way better now than beforeAnother fan added:HeatFly @HeatflyyLINKIt’s never gonna stopOne more fan continued:LeGoatJames @Sdott34LINKY’all got the number 1 pick and still bi**hing. Kyrie, klay, cooper, pj, ad is such a tuff 5 or maybe they play ad at 4 but they still bitching 😭Another fan reacted:Peet @FFB_PeetLINKHe just got LeBron and Garnett’s baby, they should praise himThe "Fire Nico" chants peaked when Luka Doncic returned to the American Airlines Center on April 10. Before the home team took on the LA Lakers in Doncic's first return to Dallas, the Mavs honored the Slovenian with a tribute video. After a standing ovation for Doncic, fans began blasting Harrison for trading the perennial MVP contender.On Wednesday, the same chants opened the watch party. The vibe eventually changed when the Mavericks picked Cooper Flagg, the unanimous No. 1 prospect in the 2025 NBA draft.Despite only a 1.8% chance of winning the 2025 NBA draft lottery, the Mavericks bucked the odds to get the No. 1 pick. Team supporters rejoiced in May after they got the first shot at getting Flagg, who many have predicted will reach peak Kawhi Leonard level.Dallas Mavericks make Cooper Flagg the No. 1 pick in the 2025 NBA draftIn perhaps the only sure move in the 2025 NBA draft, Nico Harrison made Cooper Flagg the No. 1 pick. The former Duke superstar joins a team loaded with veteran talent that includes Anthony Davis, Klay Thompson and Kyrie Irving. While AD and Thompson will be ready for next season, Irving could be out following surgery due to a torn ACL.Mavs coach Jason Kidd is upbeat about Flagg's immediate impact on the team. Without Irving, the coach expects the rookie to contribute with his playmaking, defense and versatility.Nico Harrison moved on from Luka Doncic in February. Four months later, he drafted the Slovenian's heir, who could help make the team contend for the championship.