Turner Broadcasting successfully bought the broadcast rights to the Champions League and Europa League beginning for the 18-19 season and will launch a stand-alone sports streaming service that will broadcast the vast majority of matches.
Many of the most important Champions League games, including the semifinals and final, will still be broadcast on cable television.
But eighty percent of matches will only be available to fans who pay for the new subscription service.
Turner, which owns cable networks including TNT, TBS, CNN and Cartoon Network, and already owns some rights for games in Major League Baseball, the N.B.A. and the men’s N.C.A.A. basketball tournament, will build its new product around soccer, at least to start.
Turner paid $60 million for the rights.