The Daily Bagel is your dose of the interesting reporting, writing and quipping from around the Internet.
• From Christopher Clarey: On Roger Federer's remarkable improvement at the ripe old age of 33.
• And on that note, a mesmerizing video of Federer lobbing everyone:
• Surprising news: Simona Halep has decided to split with coach Wim Fissette.
• Lindsay Davenport has signed on to work with Madison Keys during the off-season.
• Tomas Berdych is tweeting up a selfie-storm at the World Tour Finals:
• The ATP and WTA Finals, compared:
• WTA Backspin has an in-depth round-up of how the rankings shook out this year.
• The Washington Post profiles Venus Williams' interior design firm.
• Andy Murray is now a global ambassador for the World Wildlife Fund:
• Lastly, let's just check in on how Maria Sharapova's off-season is going:
A photo posted by Maria Sharapova (@mariasharapova) on