she defeated top-seed Amélie Mauresmo in the second round, saving two match points, before losing to Patty Schnyder in the following round. After the French Open, Stosur started showing symptoms of what was months later diagnosed as Lyme disease, an infection transmitted by bite of ticks. By then, her form had slumped. She lost in the second round at Wimbledon, withdrew from many tournaments on the American hardcourt swing, and lost in the first round of the US Open, where she was seeded 29th, to No.-96-rated Alizé Cornet. Stosur did not play in any more tournaments in 2007. 2008: Return from illness She returned playing two ITF events before the Rome Masters in May, where she was defeated in the second round by Venus Williams. The tournament also saw the return of the doubles team of Stosur and Lisa Raymond with a second-round loss. Less than a month later, they were defeated in the third round of the French Open, where Stosur reached the second round in singles, losing to Petra Kvitová. Stosur showed great promise at Wimbledon: while only making the second round in singles, losing to Nicole Vaidišová, she made the finals of both the ladies' and mixed doubles. She and Raymond lost the final to Venus and Serena Williams. The Williams sisters had just played against each other in the final of the ladies singles. With mixed-doubles partner Bob Bryan, Stosur defeated Mike Bryan and Katarina Srebotnik to win the title. At the Beijing Olympics, Stosur was defeated in the second round of the singles tournament by fourth seed Serena Williams. In doubles, Stosur (formerly ranked No. 1) partnered Rennae Stubbs, ranked No. 5 at the time; however, the pair were unseeded because the ITF determined the seedings for the doubles competition based on both singles and doubles rankings standings. The pair lost in the second round to the Spanish team of Anabel Medina Garrigues and Virginia Ruano Pascual, who were then ranked No. 2. At the US Open, Stosur lost in the first round of singles to seventh seed Venus Williams. She and Mahesh Bhupathi were eliminated in the second round of the mixed-doubles competition by Stubbs and Robert Lindstedt. Raymond and Stosur were runners-up in the women's doubles event, losing to the top-ranked team of Cara Black and Liezel Huber. By the end of the year, Stosur was ranked No. 52 in singles, 110 spots