I have read a few tennis books that have used the format of switching between a key match and recounting stories through the person's career. Wade uses her Wimbledon win as a focus to run alongside her biography. It reads the way she speaks and she can be as critical of herself as she has been of places she has commentated on. That big win was the highlight of her career so there may not be enough material for another book but she may have expected to be asked for another.