RIO DE JANEIRO (Interstat) — Kevin Serna’s first-half goal lifted Fluminense to a 1-0 victory over Mirassol FC on Thursday in the Carioca Série A opener for both Brazilian clubs. Serna scored in the 31st minute at Estadio Jornalista Mário Filho, providing the only offense in a match defined by stout defending. The result was tighter than pregame projections, as Fluminense secured the win despite being held below the simulator’s predicted scoreline. The physical contest featured six yellow cards. With the win, Fluminense begins its campaign with a victory while Mirassol starts with a loss.