Of the many high-powered teams in the Western Conference, San Antonio has given the Celtics the most headaches in recent years. The Celtics have a seven-game losing streak against the Spurs heading into tonight's meeting between the teams at the FleetCenter.

``They have a great defensive team and with Tim Duncan, they have probably one of the best two centers in the league,'' Celtics coach Jim O'Brien said after practice yesterday at The Sports Authority Center in Waltham. ``And he's got a pretty good center next to him in David Robinson