Angelique Kerber delighted by "unbelievable" win over Maria Sharapova

Angelique Kerber has described her fourth-round win over Maria Sharapova at Wimbledon as "unbelievable".

The German, who is seeded ninth, stunned the former champion on Tuesday with a gruelling three-set triumph.

"It's unbelievable," Kerber told BBC Sport. "It was such a tough match, playing to a high level, and it was so close.

"I'm so happy. She's a great player on grass, but I was just focusing on myself and I'm so happy to be in the quarters."

Waiting for Kerber in the quarter-finals will be Canadian 13th seed Eugenie Bouchard.