John Oudin, "Le Cocu"

John Oudin, father of American Tennis star of French descent , Melanie Oudin is a cuckold, or, as the French would say "cocu". It's a commentor who pointed us to reports about Melanie's mother's philandering with her tennis coach. Sports Illustrated reports that "According to records from Cobb County (Ga.) Superior Court, on July 24, 2008, Melanie's father, John Oudin, filed for divorce from Melanie's mother, Leslie". John Oudin filed for divorce on grounds of adultery, alleging that Leslie was unfaithful during marriage. Here's the sworn statement "I didn't initial [sic] take any action regarding my early suspicions because I didn't want to believe my wife was having an affair with my daughter's tennis coach ... On December 29, 2007, I confronted my wife about whether she was having an affair with Brian de Villiers. I confronted Brian de Villiers separately. My wife and Brian de Villiers both admitted to me they were having an affair. Both [Melanie and her twin sister, Katherine] asked me point blank if I thought Mom was having an affair with Brian. When I asked why they had suspicions, Melanie told on one occasion she woke up at 1:00 a.m. in her hotel room and Leslie was not there. She called Brian's cell phone and connected with her."
John gets an ace for this public humiliation: 9 points on the cocu scale.

Andy Mill: Game, set, cucked by Chris Evert

A commentor indicated that former tennis star Chris Evert has cuckolded her Olympic ski champion husband Andy Mill. According to The Telegraph, Andy is accusing Greg Norman, his former best friend, of stealing his wife and destroying their 18-year marriage. In the mean time Evert filed for divorce from Mill on November 13 last year, citing "irreconcilable differences''. I guess she's right, if your best friend is scoring aces by slaloming between your wife's legs, I would indeed call that an "irreconcilable difference''. 
That very public cuckolding, at an older age, earns Andy nothing less than 8 points on the cuckold scale.