The three-year deal was announced on 30 April.
ESL and DreamHack are amongst the largest esports events organisers in the world and had originally planned to non-exclusively stream their tournaments via Twitch throughout 2020.
Under the new deal, the pair will now exclusively be sharing their English-language broadcasts globally via the streaming platform throughout 2021 and 2022.
Writing in a press release, SVP of Alliances and Corporate Development at Twitch, Benjamin Vallat, said:
“ESL and Twitch have been key players in the history of esports as we know it. The continuation of our partnership will strengthen not only the content offerings for fans, but also the greater esports community that ESL, DreamHack, and Twitch have cultivated over the years.
“As part of the partnership, Twitch will become a centralized hub for streaming ESL and DreamHack competitions. The company will work directly with ESL and DreamHack to coordinate broadcast integrations and maximize sponsorships of some of the biggest esports tournaments going forward.”
Under the agreement, DreamHack and ESL will be airing a host of esports events through Twitch, including the ESL National Championships, the DreamHack Masters, ESL Pro League, the DreamHack Open, ESL One and the Intel Extreme Masters.
Tournaments for games such as Counter-Strike, StarCraft II and Warcraft III will be amongst those shown.