Daily Bagel: Ex-players best coaches?

http://youtu.be/fkZ8xMs_VVg
The Daily Bagel is your dose of the interesting reporting, writing and quipping from around the Internet.
• Video: So, Rafael Nadal is doing OK at the Rio Open.
• Goran Ivanisevic, who is working with Marin Cilic, says ex-players make the best coaches. Agree?
• Sabine Lisicki is continuing to work with Martina Hingis on a trial basis.
• Marion Bartoli stands up for gay rights, posting this picture with French track star Muriel Hurtis.
• For all the talk about equal prize money, Forbes focuses on the pay gap between the men and women in less prestigious events than Grand Slams.
• Laura Robson is still working on her rap game.
• Sloane Stephens updated her blog.
• Very funny rewrite of Celine Dion's It's All Coming Back To Me in honor of Alize Cornet's big win over Serena Williams.
• Is Davis Cup suffering in relevance as a competition? SI.com's Jon Wertheim weighed in with his thoughts in this week's Mailbag and The Overrule blog posted a response.

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.