For the first time at Euro 2020, ‘cooling breaks' will be used in Hungary's encounter versus France in Budapest on Saturday.
In each half, the game will be stopped for 90 seconds to allow players on both teams to rehydrate.
What is the rule?
Cooling breaks are not permitted until the pitch temperature reaches 32 degrees Celsius, according to UEFA rules.
If the temperature is over 32 degrees during both teams' pre-match warm-ups, a 90-second break is allowed 25 minutes into each half.
When was the rule brought in?
Cooling breaks were initially established by FIFA ahead of the 2014 World Cup in Brazil, allowing players to rehydrate for three minutes.
The first game to implement the regulation was between the Netherlands and Mexico, which took place at the Estadio Castelao in Fortaleza in temperatures as high as 39 degrees Celsius.
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