Notes. Guard Alexey Shved did not practice because of low back soreness, and the team said he is questionable for the Dallas game. . . . Despite published reports that the Sixers are preparing to call up Robert Covington from the NBA Developmental League, a Sixers official said there were no additions to announce. The 6-foot-9 Covington, who played seven games last season for the Houston Rockets, is competing for the Grand Rapids Drive.