LONDON — Tennis players from Russia and Belarus will not be allowed to play at Wimbledon this year because of the war in Ukraine, the All England Club announced Wednesday.

Among the prominent players affected by the ban are reigning U.S. Open champion Daniil Medvedev, who recently reached No. 1 in the ATP rankings and is currently No. 2; men’s No. 8 Andrey Rublev; Aryna Sabalenka, who was a Wimbledon semifinalist in 2021 and is No. 4 in the WTA rankings; Victoria Azarenka, a former women’s No. 1 who has won the Australian Open twice; and Anastasia Pavlyuchenkova, the French Open runner-up last year.

Medvedev, Rublev and Pavlyuchenkova are from Russia; Sabalenka and Azarenka are from Belarus.

Wimbledon begins on June 27. The All England Club confirmed in March that it was having discussions with the British government about whether Russians should be able to play in the grass-court Grand Slam tournament.

“It is our responsibility to play our part in the widespread efforts … to limit Russia’s global influence through the strongest means possible,” the All England Club said in a statement first posted on Twitter. “In the circumstances of such unjustified and unprecedented military aggression, it would be unacceptable for the Russian regime to derive any benefits from the involvement of Russian or Belarusian players with The Championships.”

Russian athletes have been prevented from competing in many sports following their country’s invasion of Ukraine. Belarus has aided Russia in the war.

Wednesday’s move signals the first time a tennis tournament has told players from Russia and Belarus they are not welcome.

The seven groups that run the sport around the world decided March 1 that players from those countries would be allowed to compete in WTA, ATP and Grand Slam tournaments but not under the name or flag of Russia or Belarus. Those two nations also were kicked out of the Billie Jean King Cup and Davis Cup team competitions; Russia had been the reigning champion in both.

The French Open, which starts on May 22, will be the first Grand Slam tournament held since Russia invaded Ukraine in February and is expected to permit Russian and Belarussian players to compete.

The All England Club said that if “circumstances change materially between now and June,” it would “respond accordingly.”

“We recognise that this is hard on the individuals affected, and it is with sadness that they will suffer for the actions of the leaders of the Russian regime,” All England Club chairman Ian Hewitt said. “We have very carefully considered the alternative measures that might be taken within the UK Government guidance but, given the high profile environment of The Championships, the importance of not allowing sport to be used to promote the Russian regime and our broader concerns for public and player (including family) safety, we do not believe it is viable to proceed on any other basis at The Championships.”