AFPSoham MukherjeeMan Utd legend Nemanja Vidic's 17-year-old son signs first professional contract as he looks to follow in father's footstepsManchester UnitedPremier LeagueManchester United legend Nemanja Vidic's 17-year-old son has signed his first professional contract.Article continues belowArticle continues belowArticle continues belowArticle continues belowVidic Jr. signs with Zeleznicar PancevoSerbian top-flight club based in VojvodinaLuka plays as a defensive midfielder