The Spurs' championship party began in earnest tonight with 35.6 seconds left in Game 6 of the N.B.A. finals, when Kevin Willis checked into the game to replace David Robinson, the Admiral, and give him his due.

Willis, the 40-year-old backup center who had never won a championship in 19 seasons, hugged Robinson, the 37-year-old retiring role model for a city and a franchise, and the SBC Center erupted in admiration.

Tim Duncan, the league most valuable player and the finals' M.V.P., followed seconds later, taking the cheers and the mantle from Robinson, as he has done for the last five years.

The Nets tonight were but an afterthought, shrinking under the fourth-quarter collapse they had allowed so suddenly when the Spurs went on a 19-0 rampage with 8 minutes 39 seconds left.

Duncan and Robinson were determined to end it here. The Spurs' 7-foot co-captains combined to score 34 points and grab 37 rebounds in Game 6, leading their team to an emotional 88-77 victory over the Nets to capture the franchise's second championship since 1999. Duncan had 8 blocks to go along with 21 points, 20 rebounds and 10 assists, rejecting the Nets' second straight bid to win a championship.