The Daily Bagel is your dose of the interesting reporting, writing and quipping from around the Internet.
• Peter Bodo breaks down the factors that led to Caroline Wozniacki's reign as No. 1, and the factors that will likely lead to the end of that reign.
• Are Petra Kvitova and Victoria Azarenka the next great rivalry in women's tennis?
• Roger Federer has his sights set on reclaiming the No. 1 ranking.
• Why you should expect great things from Kvitova.
• Jon Wertheim expects Kvitova to become a regular atop the always-changing WTA rankings. • Non-tennis: Ever wonder why those guys are sticking their heads out of subway trains? Here's an interesting Q&A that gives insight into a New York City subway conductor's job.