Serena Williams reaches Stanford final

Wimbledon champion Serena Williams has shown no sign of letting up at the Bank of the West Classic by reaching the final in California.

She will take on first-time WTA finalist Coco Vandeweghe after defeating Sorana Cirstea with a double break in each set.

Williams has also revealed that she is still suffering from jet lag after flying home from London and has been struggling to sleep during the week.