Russia's third-largest internet company is suing streaming service Twitch for 180bn roubles (£2.1bn) over pirate broadcasts of English Premier League games.
Rambler Group alleges its exclusive broadcasting rights were breached by the service more than 36,000 times between August and November.
It is seeking to permanently ban the Amazon-owned platform in Russia.
Twitch's lawyer has called Rambler's case "unfounded".
Russia is the third-largest user of Twitch, which has more than 15 million daily active users worldwide.
Its terms and conditions state users cannot share content without permission
from the copyright owners, including films, television programmes and sports matches.
The streaming giant's lawyer, Julianna Tabastaeva, told Russian-language news website Kommersant
Twitch "only provides users with access to the platform and is unable to change the content posted by users, or track possible violations".
She added the company took "all necessary measures to eliminate the violations, despite not receiving any official notification from Rambler".
The Moscow City Court will hear the case on 20 December.