Williams sisters meet for 20th time

KEY BISCAYNE: Venus and Serena Williams say they've seen little of each other for the past week because of their busy schedules. That was all due to change on Thursday with their meeting at the Sony Ericsson Open semifinals.

The 20th showdown between the sisters ensures a finalist from the family on Saturday. The Williams have won eight of the past 11 Key Biscayne titles.

"I believe we are the best in the world," Venus said. "I enjoy playing Serena because we challenge each other the most."