Serena Williams splits with hitting partner

In tennis, a hitting partner is someone who often does more than just practice with a big star. They sometimes have to be psychologists, waiters, chauffeurs and even bodyguards.

They may get to travel the world but the job isn’t without its perils.

Photos: 34 weeks pregnant, Alysia Montano competes at USAs National Championships

Alysia Montano's streak of USA 800m titles was snapped today at four, but the 28 year-old from Canyon Country, Calif., couldn't be happier.  In fact, she got a standing ovation from the small afternoon crowd gathered here at Hornet Stadium at Sacramento State University after she crossed the finish line of her preliminary dead last in 2:32.13.