SAN ANTONIO – Not having to deal much with Ray Allen or Vladimir Radmanovic made things much easier for the San Antonio Spurs last night. Not having those two key players could make future playoff games a lot tougher for the Seattle SuperSonics.

San Antonio already had a double-digit lead when the Sonics lost both Allen and Radmanovic to right ankle sprains in the second quarter. After that, the Spurs’ lead reached 30 points before halftime in a 103-81 victory in the opener of their second-round series.

Seattle coach Nate McMillan said X-rays were negative for both players and they would be listed as day to day. Game 2 in the best-of-seven series is tomorrow night.

“I don’t want to even think about not having Ray Allen right now,” said Seattle’s Jerome James, adding that if Allen can’t play,”I am more than ready to step up and play like I did in the last series.”

After averaging a surprising 17.2 points and 9.4 rebounds in the Kings series, James scored four points on 2-for-8 shooting and had two rebounds.

The injuries occurred in a span of less than a minute early in the second quarter, and the Spurs took advantage by going on a 17-2 run that made it 58-28 with about two minutes remaining in the half.

Allen, an All-Star who averaged 32.4 points in the SuperSonics’ first-round series win over Sacramento, got hurt while driving to the basket. Radmanovic rolled his ankle while defending Brent Barry and had to be carried from the court by teammates.

Rashard Lewis, who led the Sonics with 19 points, said the team has to step up its defense – with or without Allen.

The Spurs came out with more energy than they did in Game 1 of the opening round, which they lost at home to Denver. Tony Parker matched his career playoff high with 29 points, with 11 coming in the first quarter.

Duncan added 22 points and nine rebounds for the Spurs, who shot 51%. Glenn Robinson added 16 points. Antonio Daniels scored 15 for Seattle.

Parker said before the series started that he would attack the Sonics defense from the get-go, and he was true to his word. He drove inside for San Antonio’s first three baskets. Ten of the Spurs’ 12 field goals in the first quarter were layups, and Duncan had a dunk.

Manu Ginobili hit a 3-pointer from the left wing to give San Antonio an 18-8 lead midway through the first. Two layups by Allen and a short jumper by Lewis cut it to 19-14, but the Spurs then finished the period by outscoring Seattle 16-8.

San Antonio led by 13 when Radmanovic rolled his ankle. He had suffered a stress fracture in his lower right leg in March and missed the final 19 games of the regular season.

Seattle, which trailed 62-35 at the break, finished the second quarter by shooting 3-for-13 after Allen’s injury.