
Angelique Kerber, the Australian Open champ and Wimbledon finalist, moved into the semifinals at the US Open.

But Kerber didn't have it all her way against Vinci. Vinci -- who stunned Serena Williams last year in New York -- led by a break at 5-4 in the first.

Vinci, though, couldn't serve out the first set and her level dipped thereafter.

Kerber didn't relinquish another game as she stepped up her game and Vinci faded.

Gael Monfils could be playing the best tennis of his career. He joined Kerber in the last four -- without dropping a set -- by beating Lucas Pouille.

Pouille, Monfils' fellow Frenchman, had upset Rafael Nadal on Sunday.