Atlanta United manager Gerardo "Tata" Martino avoided addressing rumors that he is in the running for head coaching jobs with Argentina and Mexico, telling reporters on Friday that he is solely focused on his own MLS club right now.Earlier this week sources told various ESPN reporters that Martino is a serious candidate to take over at El Tri after Ricardo Ferretti was officially ruled out of contention for the position on Tuesday."I'm taking it with humor this morning because it's funny in these situations that I'm always asked to . . .