Daily Bagel: Del Potro swims with dolphins, Nadal sprains ankle in Miami

The Daily Bagel is your dose of the interesting reporting, writing and quipping from around the Internet.
• Serena Williams and Beyonce? The new Vogue covergirlbusts a move in this behind-the-scenes video.
• Rafael Nadal sprained his ankle during practice in Miami.
• CiCi Bellis earned her first WTA win of the season at the Miami Open and will play Zarina Diyas for a chance to play Serena.
• Juan Martin Del Potro will begin his return in Miami against Vasek Popisil in the first round, but first, he took some time to swim with the dolphins with some other players, including Sam Querrey, Nenad Zimonjic, Ryan Harrison, Steve Johnson and Feliciano Lopez.
• Bob Hewitt has been convicted of rape by a South African court.
• Two lower-ranked players have been suspended for match-fixing.
• ATP Indian Wells Hot Shots:
[youtube=https://www.youtube.com/watch?v=IXvnIk5xkTk]
• A very pregnant Li Na was spotted hitting some tennis balls in China.
• Claudine Rankine's new book Citizen includes an entire chapter on Serena Williams. Her thoughts on Serena's return to Indian Wells last week here.
• On the same note, a thoughtful summary of Serena's week in Indian Wells from Louisa Thomas for Grantland.
• WTA Indian Wells Hot Shots:
[youtube=https://www.youtube.com/watch?v=o9vpAu5M0dM]
• Steve Tignor on the humanity of a tennis player.
• Wozniacki opens up about the end of her relationship with Rory McIlroy.
• No more Halle: Nadal will return to the Aegon Championhips at Queen's Club.
• Sick catch, Novak:
#https://vine.co/v/OYFEO7rp3KV
Novak Djokovic caught a Roger Federer return with just his racket

Contributor, SI.com Nguyen is a freelance writer for SI.com, providing full coverage of professional tennis both on and off the court. Her content has become a must-read for fans and insiders to stay up-to-date with a sport that rarely rests. She has appeared on radio and TV talk shows all over the world and is one of the co-hosts of No Challenges Remaining, a weekly podcast available on iTunes. Nguyen graduated from the University of California, Irvine in 1999 and received a law degree from the University of California, Davis in 2002. She lives in the Bay Area.