A legal brawl has broken out between Comcasts Sky and Warner Bros. Discovery, with the European media giant suing over breaches to a 2019 deal for exclusive rights to shows.

Sky, in a lawsuit filed on Friday in New York federal court, says Warners was obligated to offer the opportunity to partner on at least four shows per year, including the upcoming Harry Potter series, but fell far short of that mark for nearly the entire duration of the contract.

Instead, Warners has largely disregarded the parties agreement and sought to keep the Harry Potter content for itself so that it can be used as the cornerstone of the launch of its Max streaming service in Europe, the complaint states. Sky seeks a court order that would force the David Zaslav-led company to bring it on as a co-producer on the production.

In a statement, Sky said it filed the lawsuit to safeguard our interests and enforce our rights to partner in the production and distribution of highly valuable content.

More to come.