Despite all the rule changes due to COVID-19 and the novelty of hosting a tournament in 11 countries, the main rules of extra time at Euro 2020 remain the same, and they've come into play now that the competition is into the knockout stage.
If any game between the round of 16 and the final is tied after 90 minutes, the two teams will take a brief break before two 15-minute periods, which will be played to completion and also have a break between them. If the match is still a draw after the 30 additional minutes, then the teams will take the standard five rounds of penalty kicks to determine a winner.