In 1993 became the director of the youth soccer, Lou Fusz Soccer Club, which has teams playing in the St. LouisYouth Soccer Association (SLYSA) soccer league and the Midwest Regional League (MRL)
While playing for the St. Louis Stars, Popovic also served as an assistant coach. In 1974, Popovic became the head coach of the Serbian White Eagles. He took the team to the 1975 Canadian National Soccer League championship.[3] In 1976, the Rochester Lancers of the North American Soccer League hired Popovic as head coach.[4] In 1978, the New York Arrows entered the newly created Major Indoor Soccer League. It drew most of its players from the Lancers and hired Popovic as head coach. He led the Arrows to four consecutive MISL championships (1979–1982). The Arrows fired him at the end of February 1983 and he was hired a week later to coach the Golden Bay Earthquakes.[5] He coached the Earthquakes during the 1983 and 1985 outdoor seasons as well as the 1983–1984 indoor season. The Earthquakes sat out the 1984–1985 indoor season. On 16 December 1984, the Las Vegas Americans hired Popovic to replace player-coach Alan Mayer as head coach.[6] When the Americans folded in June 1985, Popovic was hired by the Pittsburgh Spirit.[7] The Spirit folded at the end of the season and Popovic committed to coaching a team in Portugal. In December 1985, the New York Express made an offer to hire Popovic. While he began running practices and overseeing player acquisitions and even coached one game in late January 1987, the team never signed him to a contract.[8] When no coaching jobs became available, Popovic entered the real estate business. In 1989, the expansion St. Louis Storm hired Popovic. He coached the team for nearly three seasons before being fired in March 1992.[9] He was inducted into the St. Louis Soccer Hall of Fame in 2004.[10]