TOKYO—A Belarusian athlete at the center of an Olympic standoff with her own country walked into Poland’s embassy in Japan on Monday, a day after refusing to board a flight home she said she was being forced to take against her wishes by her team. Krystsina Tsimanouskaya, 24, would seek asylum in Poland, said a…

TOKYO—Poland granted a visa Monday to a Belarusian Olympic sprinter who said she feared for her safety and that her team’s officials tried to force her to fly home, where the autocratic government was accused of diverting a flight to arrest a dissident journalist. An activist group that is helping athlete Krystsina Tsimanouskaya told The…