Antoine Walker insists the Celtics' system functioned properly for him in Boston's three straight losses to the New Jersey Nets.

Walker was simply unable to finish what the system set him up to accomplish.

Walker worked on his inconsistencies at yesterday's practice at The Sports Authority training center in Waltham in an effort to regain his scoring touch. If the Celtics hope to avoid a four game sweep by the Nets, Walker must complete whatever plays he sets in motion against New Jersey tonight (TNT, 8 p.m.) at the FleetCenter.