By Joseph McBride Lionel Messi shared the field with Luis Suarez for the first time since leaving Barcelona on Friday night, but Inter Miami struggled with their biggest stars on show against El Salvador. After sealing his winter switch from Gremio to Miami, Suarez made his debut alongside Messi, Sergio Busquets, and Jordi Alba at the Estadio Cuscatlan. The unconventional pre-season friendly saw Major League Soccer side Miami face the nation currently ranked 70th in the official FIFA standings. It was a full house in San Salvador as locals piled in to watch their national team face four footba…