World No 1 Daniil Medvedev has said he is "waiting for the moment" he is allowed to play under the Russian flag again despite there appearing no immediate end to his country's invasion of Ukraine.
Since the conflict began on February 24, Russia and Belarus - who have backed Vladimir Putin's decision to declare war - have been the subject of numerous sporting sanctions.
Indeed, last week their athletes were barred from competing in the 2022 Winter Paralympics in Beijing, despite having already arrived in China.