Vinny Del Negro and the Chicago Bulls inverviewed Paul Westphal for an assistant job on Wednesday, the Chicago Tribune is reporting.

The Bulls also interviewed former Sonics' Coach Bob Hill before interviewing Westphal, who has had held head coaching with Phoenix and Seattle, including coaching the Suns against the Bulls in the 1993 NBA Finals.

Both would be considered offensive assistants while the Bulls are considering making a run at Tom Thibodeau, whose one-year contract with the Celtics is expiring, for defensive purposes.

Del Harris and Bernie Bickerstaff also could be interviewed for positions on Del Negro's staff.