Williams is working his way back from fractured left rib cartilage. He missed his seventh consecutive game Wednesday night at Sacramento.
The Nets say Williams ''has begun on-court non-contact work,'' but is still experiencing pain.
The former All-Star has battled injuries since signing a $98.5 million, five-year contract in July 2012. He originally hurt his rib Jan. 4 in Miami, and then lasted only four minutes when he tried to return three days later.
Williams is averaging 13.9 points and 6.3 assists in 32 games this season.