FORT LAUDERDALE — Lionel Messi and Javier Mascherano are together again, this time with Inter Miami. The former Barcelona and Argentina teammates have reunited, with Inter Miami announcing Tuesday that Mascherano’s hiring as the club’s new coach is complete. The sides struck a deal late last week for Mascherano to replace Gerardo “Tata” Martino, who stepped aside for personal reasons. Mascherano most recently was Argentina’s under-20 team and Olympic coach.