WTA Insider Courtney Nguyen | Ajla Tomljanovic tests out a new coach this week, Andrea Petkovic takes over SI.com's tennis mailbag and Louisa Chirico continues her career week.
WTA Staff

- News: Ajla Tomljanovic is working with former ATP pro Jean Laffnie de Jager on a trial basis in Stanford. Tomljanovic split with coach David Taylor in June. More from WTA Insider here.

- Caroline Wozniacki says the back injury that bothered her at Wimbledon is better and she's ready to attack the hardcourts. More from WTA Insider here.

- Andrea Petkovic took over Jon Wertheim's weekly mailbag at SI.com. Here's a preview of her Top 10 reading list:
"I always put it No. 1 because it was the first book that hooked me, and it's The Sorrows of Young Werther, by Johann Wolfgang von Goethe, a German writer. No.2: Infinite Jest by David Foster Wallace. Amazing book. No.3 I would put War and Peace by Leo Tolstoy. It's just a classic and it's really good to learn about the Russian culture. No.4 I would put Herman Melville's Moby Dick. Really good book as well and you learn so much about whale fishing, it's crazy. No.5 I would go with The Second Sex by Simone de Beauvoir. It was one of the first feministic books and she's very intelligent."

- Louisa Chirico earned her first WTA main draw win on Monday and followed it up with her first Top 30 win, beating Alizé Cornet, 7-5, 4-6, 7-6(4), to advance to her first WTA quarterfinal at the Citi Open. More on Chirico's career week at The Washington Post.

- Svetlana Kuznetsova withdrew from the Citi Open with a lower left leg injury.

- Sam Stosur, currently riding a seven-match win streak, backs her chances of stopping Serena Williams' quest for the Grand Slam at the US Open.
"I've always actually quite enjoyed playing Serena. I've got a game that disrupts her," Stosur said. "You have to have the game. My game matches up well against Serena. I've got the kind of weapons that can bother her."

- More details on the new iPads developed by SAP for coaches to use during on-court coaching timeouts.

Updated four times every minute, SAP Tennis Analytics provides side-by-side comparisons of a full list of match stats for both players, scoring data, each player's success rate in winning a game while serving, and the number of break points saved. Also tracked are serve direction and placement on the court, contact point for returning a serve, and placement of rally shots.

Stacey Allaster, CEO and chairman of the WTA said SAP's analytics tool is "a game-changer that will not only enhance our athletes' preparation and performance but also the fans' experience when watching women's tennis."

- Class act: After a tough three-set loss to Mona Barthel at the Bank of the West Classic on Wednesday, Petkovic gave a racquet away to a young fan: