Daily Bagel: Kvitova hires Li Na's former fitness coach

The Daily Bagel is your dose of the interesting reporting, writing and quipping from around the Internet.

• Simon Briggs for The Telegraph looks in to the ATP's options for moving the World Tour Finals outside of London after its lease ends next year: Stay in London or move to either China or the Middle East. 

• According to this Czech report, Petra Kvitova has hired Li Na's fitness coach Alex Stober. Given his success with Li, this could be exactly what Kvitova needs.

• Steve Tignor on the less-than-stellar matches through the first two days of the ATP World Tour Finals. 

• From The Changeover: Only four players born after Novak Djokovic have crossed the ATP's 4,000 point threshold: Juan Martin del Potro, Marin Cilic, Kei Nishikori, and Milos Raonic. How many did it in Roger Federer's generation? 13.

• Watch: When Roger Federer is moving like this, watch out:

[youtube=http://youtu.be/xYf7LaDLqc8]

• If you're thinking of making the trip to Singapore for the WTA Finals next year, bookmark this. 

• From USA Today: Selling Raonic, Nishikori and Cilic as tennis' next stars

• Thoughts on the Czech Republic's burgeoning Fed Cup dynasty. 

• And it's not just the Fed Cup team. How and why have the Czech Republic enjoyed such recent success in both Fed Cup and Davis Cup?

• According to Matt Cronin (great to have him back on the tennis beat, by the way) Maria Sharapova will play Russia's first round Fed Cup tie vs. Poland in February. 

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