Serena not sure Venus will play Miami

Serena Williams tells USA Today that while her sister Venus will go to the tournament in Miami in a week and a half's time, but she is not sure whether she will compete there.

The 31-year-old Venus Williams played her first match since the US Open in a Fed Cup doubles victory in early February with Liezel Huber against Belarus. She is contending with the autoimmune disease, Sjogren's syndrome, and pulled out of last week's event in Kuala Lumpur.