Serena Williams joins Taylor Swift onstage during London concert

Serena Williams, still the No. 1 women’s tennis player in the world, is preparing for Wimbledon like every professional athlete should: By attending a Taylor Swift concert in London with her best friend, Caroline Wozniacki.

All young, aspiring tennis players learned a valuable lesson today. If you want to be the best tennis player in the world, Taylor Swift should be an essential part of your tournament preparation.

(h/t WTAtennis.com)

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