In early June 2014, the national team's newly appointed head coach Saša Đorđević announced Mačvan alongside 28 other individuals on the preliminary list of players he was considering for the 12 final roster spots at the 2014 FIBA World Cup. On 1 July, announcing the official call-ups for the start of the training camp, Đorđević crossed out 9 names from the preliminary list including Mačvan's, saying the 24-year-old got excluded for tactical reasons while adding he had "an unfocused season [at Galatasaray] without a specific position". Two days later when Novica Veličković, one of the 20 players who received call-ups, announced he wouldn't be showing up to training camp due to knee injury, agitated Đorđević criticized him in the media: "I'm blindsided and disappointed by Veličković's unfair move. We've been in constant contact before the call-up list had been announced and not once did he mention anything about an injury... More than anything else he owes an explanation to Duško Savanović and Milan Mačvan, two players that weren't called-up because I gave Veličković the advantage over them. If you're wondering if I'll now be calling-up either Savanović or Mačvan, I won't be. My face is way too red in front of them over this to do that now".