Serena Williams' comeback from injury ended in a 6-3 6-1 defeat by Elena Dementieva at the Champions Challenge. Williams, playing her first match since September, was beaten in less than an hour in Hong Kong.
The 24-year-old will need to play far better if she is to defend her Australian Open title in Melbourne in less than two weeks.
In Wednesday's second match world number one Lindsay Davenport handed Nicole Vaidisova a 6-2 6-2 defeat.