Czech team spokesman Petr Šedivý says the medical team has been treating Darida and it was not yet clear if he will recover in time for Sunday’s game in Budapest.
Darida’s loss would be a blow for the Czechs. The 30-year-old midfielder is the engine of the team and its most experienced player with 73 international appearances.
The team’s flight to Budapest was postponed until later in the day because of a technical problem with the plane.
Finnish health authorities have detected a spike in coronavirus cases that has been traced to soccer fans returning from neighboring Russia following European Championship matches in St. Petersburg.
The Finnish Institute for Health and Welfare has urged “all passengers who have traveled from St. Petersburg to Finland by any bus company to apply for a coronavirus test.”
Finland played two of its Euro 2020 group games in St. Petersburg, The team faced Russia on June 16 and Belgium on Monday. At least 2,000 Finns are estimated to have traveled to the city for those matches.
The Finns finished in third place in their group and were eliminated. Russia was also eliminated after finishing last.