If Tim Duncan was surprised when the Phoenix Suns didn't double-team him, it didn't take him long to take advantage of it.

Duncan scored 12 of his 32 points in just more than four minutes down the stretch Thursday night as the San Antonio Spurs beat the Suns 102-96 in the opener of their first-round playoff series.Duncan had 28 points in the second half, including 18 in the fourth quarter, and 10 rebounds.

"At the time, I really wasn't thinking about it," he said about the absence of extra attention. "I can look back now and say, `Yeah, I thought they'd double-team a lot more,' but at the time I was looking at my man only."

Duncan showed a variety of hook shots and baseline moves, especially when he made five baskets and two free throws in a personal 12-6 run that brought San Antonio from behind while he was matched up with Hot Rod Williams, Phoenix's best big-man defender, and Antonio McDyess.

"We talked about doubling down on Duncan in the fourth quarter," Phoenix coach Danny Ainge said. "We flew at him a couple of times. By the time the double-team got there, he had already put the shot up."

David Robinson had 26 points, 15 rebounds, five assists and five blocks for the Spurs, and Avery Johnson scored 22 points.

The performance left Ainge wondering what it would take to stop San Antonio's twin towers in the second game, scheduled for Saturday.

"Tim has really come in and assumed that role of being a great post-up guy down the stretch," Robinson said. "He's got all the great moves. I have no problem with him posting up down the stretch. I post up some, but my job is to anchor the defense."

Kevin Johnson led the Suns with 18 points, and Jason Kidd had 17 points, 11 assists and six steals.

Duncan's first three field goals during the 12-6 run gave the Spurs a lead each time. The third lifted San Antonio to an 88-87 lead with 4:46 remaining, and it was 94-89 when Duncan made his last free throw 2 1/2 minutes later.