The build-up to England's World Cup semi-final against Argentina has taken a contentious turn following FIFA's choice of referee.
With Thomas Tuchel's side striving to reach their first final since 1966 and the defending champions chasing consecutive titles, every decision in Atlanta will face immense scrutiny.
Argentina's knockout run has already generated complaints about VAR and refereeing, so the appointment was always likely to attract attention.
The appointment of Ismail Elfath to referee Wednesday's semi-final has intensified the debate, with concerns about possible favouritism growing.
The Moroccan-born American will be assisted by Corey Parker and Kyle Atkins, while Italy's Maurizio Mariani has been named fourth official.
Elfath has already handled three games at this World Cup, although this will be his first involving either England or Argentina.
He has served as fourth official when Argentina defeated France in the 2022 World Cup final and has also refereed several Inter Miami matches since Lionel Messi moved to MLS, including the 2023 Leagues Cup final against Nashville.
The concern surrounding Elfath's appointment stems from his previous connections to matches involving Messi, but it remains unclear whether this constitutes an improper relationship or biased decision-making.
Referees frequently oversee the same leading players, especially when they work in the league where those players compete, so Elfath should be judged on his performance in the semi-final rather than his previous contact with Messi.
FIFA's refereeing chief has rejected allegations of bias, insisting that World Cup officials work independently, and questioning their integrity without evidence is unacceptable.
Argentina's victories over Egypt and Switzerland have been met with controversy, with opponents repeatedly complaining about decisions benefiting the team.
Former FIFA referee Christina Unkel has said that the incidents she reviewed did not clearly demonstrate poor officiating, but even a correct but marginal call could still trigger a major backlash.
FIFA must understand why the appointment has created nervousness, and the pressure will be on Elfath to make the right decisions in the semi-final.
