Serena unsure if 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, she is not sure whether her she will compete there.

Venus, 31, played her first match since the U.S. Open in Fed Cup, winning a dead-rubber doubles match in early February with Liezel Huber against Belarus. She is contending with Sjogren's syndrome, an autoimmune disease, and pulled out of last week's event in Kuala Lumpur.