Cross, Rod, and Graham Pollard. “Grand Slam Men’s Singles Tennis 1995-2009 Part 2: Points, Games and Sets”. ITF Coaching & Sport Science Review 19, no. 53 (April 30, 2011): 4–8. Accessed May 21, 2024. https://itfcoachingreview.com/index.php/journal/article/view/542.