You tried going to http://www.changeovertennis.com/things-we-learned-on-day-9-of-the-2015-french-open/screen-shot-2015-06-01-at-21-50-42/BackSwings, and it doesn't exist. All is not lost! You can search for what you're looking for.
http://www.changeovertennis.com/things-we-learned-on-day-9-of-the-2015-french-open/screen-shot-2015-06-01-at-21-50-42/BackSwings