Piatek sustained the injury in the second half of Hertha's 2-1 Bundesliga victory over Schalke 04 on Wednesday.

"Surgery is necessary. A three or four-month break is awaiting the player," national team doctor Jacek Jaroszewski said in a statement from the Polish FA. Poland face Slovakia in their opening game of the tournament, which was delayed by a year due to the COVID-19 pandemic, on June 14 before playing Spain and Sweden.