Only one of the Williams sisters is heading to a semifinal, and it's not the one with the long winning streak. Serena Williams lost that - and her cool - at the Western & Southern Open on Friday.
Williams had her 19-match streak ended by Germany's Angelique Kerber, a 6-4, 6-4 defeat that marked the first time she'd even lost a set since her title at Wimbledon. The thirdlongest winning streak of her career didn't end quietly.
She flung her racket at the ground, picked it up and slammed it on the court again as the second set slipped away.
"I probably need a break," she said.
While Serena fumed over missed shots, older sister Venus had another jumpfor-joy day. She reached the semifinals of a tournament for the first time this season by beating Samantha Stosur 6-2, 6-7 (2), 6-4.
On the men's side, Novak Djokovic and Juan Martin del Potro won in straight sets, setting up a rematch of their bronze medal match at the Olympics. Del Potro won that one.
After all of her summer success on Wimbledon's grass, Serena Williams is having a tough time getting readjusted to hard surfaces. She came into Friday's match with a 64-4 record in the summer hard-court season over the last two years.
