Venus Williams will not play in the season-ending championships in Doha or the Fed Cup final against Italy because of a knee injury.
In a statement quoted by AP, Williams said, "I have been getting treatment and therapy on my knee and have been making progress, but unfortunately must continue to keep weight off my knee for the short term and won't be ready to return to competition in 2010."
Photographs taken of Williams in Los Angeles earlier this week showed her walking on crutches.