UEFA on Thursday stopped ticket sales for fans in Great Britain for the European Championship quarter-final on Saturday in Rome between England and Ukraine amid fears of violations of Italy's corona rules.

In addition, tickets already purchased in Great Britain will be canceled retroactively from June 28.

It is unclear how many British tickets in total have been blocked for the match in the Italian capital.

"Italian authorities have urged UEFA to take measures to prevent British citizens from circumventing the required quarantine measures upon entry into Italy," UEFA said.

Travelers from Great Britain currently have to quarantine for five days if they want to come to Italy.

There is also concern in Italy about the emergence of the highly contagious Delta variant of the coronavirus.

"Given the current situation, it is impossible to come to Italy now to watch the match on Saturday and at the same time comply with the quarantine period," said Health Ministry Secretary Pierpaolo Sileri.

A special unit of the Italian police will strictly monitor that all corona rules are observed by the football supporters present.

England-Ukraine starts on Saturday at 9 p.m. in Stadio Olimpico in Rome.

See also: View the route of the eight quarter-finalists to the European Championship final