Argentina’s Prestianni was handed a six-game ban, with three of them suspended, for discriminatory conduct in the first leg of Champions League play-off tie against Real Madrid on February 17.
Madrid forward Vinicius Junior accused the 20-year-old Prestianni of racism as they clashed on the field, which Prestianni denies.
As the two argued, Prestianni spoke to Vinicius while covering his mouth, with the Brazilian subsequently complaining to the referee, leading to the match being suspended for 10 minutes.
“The FIFA Disciplinary Committee has decided to extend the six-match ban imposed by UEFA on SL Benfica player Gianluca Prestianni to have worldwide effect,” FIFA told AFP.
“The sanction has been extended in accordance with article 70 of the FIFA Disciplinary Code.”
Prestianni, who made his only international appearance last November, has already served one match of his suspension, missing the Champions League play-off second leg.
Following FIFA’s decision, the former Velez Sarsfield player would miss holders Argentina’s two opening games of the World Cup, which takes place in the United States, Canada and Mexico between June 11 and July 19.