King co-founded World Team Tennis in 1974, but not many innovations of that annual summer professional mixed league - which has not taken place since 2021 - have been adopted by the main tours.
"I would like to see names and numbers on the back of the shirt in tennis," she said.
"I want to make it easy for fans. I think it should be 1-2-3-4 not 15-love, 30-love.
"If you are a kid - I didn't come from tennis - what the heck does that mean? If we want to get eight, nine, 10, 11, 12-year-old children involved in our sport we have to make it accessible to them - not to a 60-year-old fan."