Comcast will move Tennis Channel from a more pricey sports tier to a basic digital tier on September 7, the cable giant said on its web site.

The Federal Communications Commission recently ordered Comcast to place Tennis Channel on the same tier as NBC Sports Network and Golf Channel, two channels it owns.

Comcast will challenege the FCC's decision to the U.S. Court of Appeals, but that process could take months. Tennis Channel says that once Comcast makes the tier adjustment, the network will be available in about 18 million more homes.

"Tennis Channel will remain available in the Sports Entertainment Package, but it also will be included as part of our Digital Starter or Digital Preferred level of service, depending on where you live," Comcast said. "If you receive Digital Starter or Digital Preferred—and most of our customers do—you will receive Tennis Channel, except for in a relatively small number of systems…on your channel lineup on or before September 7, 2012."