Martina Navratilova says the Williams sisters need to hurry to match her record of nine Wimbledon singles titles. The 29-year-old Venus lost to Serena at Wimbledon this month, keeping her at five. Serena now has three Wimbledon crowns and is 15 months younger. "They'll have to play a lot of years to catch up," Navratilova said in a phone interview. More...