Laura Robson withdraws from Miami Masters

Laura Robson has been forced to withdraw from next week's Miami Masters after failing to recover from a wrist injury.

The 20-year-old has not played since losing in the first round of the Australian Open in January, and the left-hander revealed on her official Facebook page that she isn't able to compete in Florida.

Robson wrote: "Rough day, have sadly had to withdraw from Miami due to my ongoing wrist issue."

The British number one has fallen down to 54th position in the WTA rankings.