The Daily Bagel is your dose of the interesting reporting, writing and quipping from around the Internet.
• Video: A look back to Luxembourg 2007, when teenager Ana Ivanovic was pulling faces on her way to the title. Ivanovic is into the quarterfinals of Moscow this week.
• On the feel-good stories front: Venus Williams is into the quarterfinals of Luxembourg after beating Mona Barthel and could move past Christina McHale in the rankings with one more win. Joining her is Andrea Petkovic, who defeated Jelena Jankovic 7-5, 6-0 -- yes you read that score right -- for her first back-to-back wins of the year. In Vienna, Tommy Haas is also into the quarterfinals, recording his 500th career win over Jesse Levine.
• Doug Robson reports on doping in tennis for USA Today, focusing on the difficulty of testing in an underfunded program and how USADA's Armstrong report sheds light on just how easy it could be to evade the system.
According to Pound, cheaters involved in a "micro-dosage program" could use blood boosting products like Erythropoietin (EPO) or synthetic testosterone and clean it from their system in six to eight hours -- much like Armstrong and his seven Tour de France winning teams did, according to the USADA report last week detailing allegations of widespread doping that caused the American cyclist to step down from his own cancer-fighting charity Wednesday.
"If you know you have a window for it, that's all the time you need," Pound said. "By 8 a.m. when testers come, you're clean."
• Sam Stosur had to walk home at 1 a.m. after her match at the Kremlin Cup because no tournament transport could be found. Way to treat your top seed, Moscow.
• Congratulations to Robin Soderling and his girlfriend, Jenni Mostrom, on the birth of a healthy baby girl. The Swede is reportedly back on court hitting as well.
• Non-tennis: Here's a Star Wars flash mob in Cologne, Germany, to wind down your work week.