And at an early age that passion was not tennis.' At 6ft 4in Shelton is tall but not by the standards of the biggest servers in history ... Shelton's serve is the fastest of all time.

Power Narrator: Serena's power serve is one of the fastest in the game, averaging 170 kilometers per hour. That's about 12 kilometers per hour faster than the average female professional tennis ...

As you’ll learn this week, when it comes to tennis, Florida isn ... set against Elina Svitolina. The serve would have tied Sabine Lisicki for fastest in the WTA, but unfortunately it didn ...