Standing like giant stickers from a collector's album, the posters bore the faces of several journalists jailed in Russia, peering out form behind bars, under a banner reading "During the World Cup, repression continues".
Reporters Without Borders (RSF), which organised the protest, says seven journalists are in prison in Russia due to their work and 34 have been killed since President Vladimir Putin came to power in 2000.
"The cameras are going to be focused on the pitch, on the corridors leading to the changing rooms, but what we want to do is focus them the other way, on Russia the country," RSF's Christophe Deloire told Reuters.
Among the "players" at the protest was investigative reporter Alexander Sokolov, convicted of organising an extremist group and attempting to overthrow the authorities, a verdict RSF called "spurious" and politically motivated.
Before his arrest, Sokolov was researching alleged embezzlement of 93 billion roubles (1.2 billion pounds) of public funds.
(Editing by Robin Pomeroy)
