They used to do hotgirl roller derby kinda in the same vein as WWE.
I think you could apply a similar concept of like athletic hotgirl dress up and athletic performance competition with Tennis, yes I do.
Teams of girls in uniforms.
Shorter skirts, shorter tops, athleticware/tape to emphasize the booty.
Get sponsors who help design and advertise on the uniforms.... Playboy Team, LuLu Lemon Team, Victoria's Secret Team, etc.
If a network could build one of these concepts they could do a whole slew of different sport entertainment products.... Tennis, Bags, Roller Derby, Football, Soccer, etc.
Focus the advertising on the arena and uniforms so you can stream it online for free with a delay in new content.