Jailed Kremlin critic Alexei Navalny is due back in court for a slander trial despite Western calls for his release and on the same day as the European Union's top diplomat is in Moscow for talks with Russia's foreign minister.
Navalny, President Vladmir Putin's most prominent critic, was jailed this week for almost three years for parole violations he called trumped up, a case that the West has condemned and which has spurred talk of sanctions.
Russia has accused the West of hysteria and double standards and said the protests over his jailing, in which thousands were detained, were broken up by police because they were illegal.
Navalny is due in court on Friday morning on charges he slandered a World War II veteran who took part in a promotional video backing last year's reforms that let Putin run for two more terms in the Kremlin after 2024 if he wants.
Navalny described the people in the video as traitors without a conscience and as corrupt lackeys.
Though the charge is currently punishable by up to two years in jail, he cannot face a custodial sentence because the alleged crime was committed before the law was changed to make it a jailable offence, according to Navalny's lawyer.
Josep Borrell, the EU's top diplomat, is set to meet Russian Foreign Minister Sergei Lavrov on Friday.
Despite close trade ties and energy interdependence, Russia's political relations with the European Union have been at post Cold War lows since Moscow annexed Crimea from Ukraine in 2014.
The meeting comes as Navalny associate Leonid Volkov says his allies will not hold street protests in the immediate future.
Police have detained thousands of people in recent weeks for taking part in rallies against Navalny's jailing, according to a protest monitor.
"We will hold rallies, but not every week. (We will start) in spring and summer," Volkov, currently outside Russia, told an online video channel.