U.S. broadcaster HBO will be dropping live boxing from its programming schedule from 2019 due to dwindling ratings, ending a 45-year association with the sport.

With the top fights on pay per view and boxing available on other places and platforms such as the streaming service Dazn, which in may partnered with matchroom boxing in a $1 billion eight-year deal to broadcast 16 U.S. based fights a year, HBO has decided to put those resources into other projects.

HBO burst onto the boxing scene in 1973, when it broadcast George foreman’s knockout of heavyweight champion Joe Frazier, and for 45 years it showcased some of sport’s biggest names and bouts.

But over the last two years HBO has seen its viewing numbers for boxing drop by a third while research has indicated subscribers were not signing up to the service strictly for boxing.