Fifa confirmed a global ban Wednesday for Gianluca Prestianni that will rule the Benfica winger out of two World Cup games in the United States if he is selected in Argentina’s squad. Uefa imposed a six-game ban – with three games deferred on probation – on Prestianni two weeks ago for his verbal abuse of Real Madrid’s Brazilian forward Vinícius Júnior in the Champions League . Prestianni covered his mouth with his jersey while using the insult. Fifa has now, as expected, fulfilled Uefa’s request to apply the ban beyond European competitions to the World Cup that starts next month. “The Fifa Disciplinary Committee has decided to extend the six-match ban imposed by Uefa on Benfica player Gianluca Prestianni to have worldwide effect,” the soccer body said in a statement. It is unclear if Prestianni is still in Argentina coach Lionel Scaloni’s plans to defend the country’s World Cup title. Argentina starts against Algeria on 17 June in Kansas City and plays Austria five days later in Arlington, Texas.…