The increase in squad sizes competing at Euro 2020 has been approved by UEFA.
European football's governing body will allow managers select 26 players instead of the usual 23.
However matchday squads for this summer's pan-European tournament will remain at 23.
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Squads must be finalised by June 1st but teams will be able to replace players for serious injury or illness, or if they are a Covid-19 close contact, up until their first match of the tournament.