ESPN is suing Verizon in an escalating clash over how the popular sports channel is being sold in a discounted pay-TV package.

The complaint filed Monday in New York’s state Supreme Court alleges Verizon is breaking its contract with ESPN, owned by Walt Disney, by unbundling the sports channel from the main programming line-up of Verizon’s FiOS TV.

The legal showdown could have ripple effects on how other pay-TV programming is packaged.