Russia's Supreme Court will on Monday once again hear the case concerning the exclusion of the Yabloko liberal opposition party from parliamentary elections in September.
The anti-war party has lodged an appeal against the court's decision, handed down a week ago, to exclude it from the Duma election.
Observers expect the Kremlin-controlled court to uphold its decision in Monday's appeal hearing.
The court had upheld a complaint by the ultra-nationalist Rodina party, which is loyal to the Kremlin, and which had accused Yabloko of breaching Russia's electoral laws.
At almost the same time, the Pskov City Court is due to announce its verdict against the party's deputy leader, Lev Shlosberg.
In a controversial trial, the public prosecutor's office has sought a sentence of twelve years and one month in a penal colony for the prominent Russian anti-war activist and opposition figure. Shlosberg is charged with allegedly denigrating the Russian armed forces.
Yabloko advocates a ceasefire in the Russian war of aggression that has been ongoing for four and a half years. Parties loyal to the Kremlin criticize Yabloko members as traitors and agents of the West.
Opposition figures have repeatedly been branded extremists. Commentators suspect that the government aims to have the party dissolved.