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The referee for tonight's Egypt and Iran match is Szymon Marciniak, an official from Poland.
Both sides still have a chance of getting through to the knockout stage. A victory for Iran would put both sides through regardless of Belgium's result against New Zealand, with Egypt progressing as one of the best eight third-placed sides in that scenario.
An Egypt win would put Iran out of the competition, while a draw would leave Iran either to hope Belgium fail to better their result, or that finishing with three points and a neutral goal difference would be enough in the third-place table.
Kick-off is set for 8pm local time (4am UK time) at Seattle's Lumen Field, with the New Zealand-Belgium clash taking place simultaneously north of the border in Vancouver.
The referee appointed for Egypt vs Iran is Poland's Szymon Marciniak.
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The 45-year-old is one of the more experienced officials at this summer's World Cup having been active in the Ekstraklasa since 2009.
Since then, Marciniak has officiated at every Euros and World Cup except for Euro 2020, instead flying over to referee at the Arab Cup later that year.
In 2022, Marciniak earned the distinction of refereeing the World Cup final as Argentina triumphed over France. A year later, he was also put in charge of both the Champions League final and the Club World Cup final.
Running the line will be two of his countrymen, Tomasz Listkiewicz and Adam Kupsik.
The fourth official is Yusukue Araki, with fellow Japanese Jun Mihara as the reserve official.
VAR details are yet to be confirmed.