The Daily Bagel is your dose of the interesting reporting, writing and quipping from around the Internet.
• Video: Some highlights of Juan Martin del Potro's offseason training. From this video, we can assume that he wore a shirt about 30 percent of the time.
• In this quick hits video with Serena Williams, she reveals, among other things, that she would like to trade places with her dog, Chip.
• Sloane Stephens has hired Paul Annacone as her full-time coach for the 2014 season.
"I'm happy to add Paul as my coach for the 2014 season," Stephens said. "His success as both a player and coach speaks for itself. We had a great preseason working together and I'm excited for the opportunity to continue working together."
• Defending Australian Open champion Novak Djokovic returns to Centre Court for the first time since his victory.
• Roger Federer's family (with a baby on the way) made the trek to Australia.
• Larry Ellison, owner of the BNP Paribas Open and its venue, the Indian Wells Tennis Garden, has been named Tennis News' Person of the Year.
Non-tennis: Revisiting the 'whack heard 'round the world.'