SAN ANTONIO - With Ray Allen and Vladimir Radmanovic at their best, the Seattle SuperSonics had a good shot at knocking off the San Antonio Spurs.

Without them, they know they're in big trouble.

The Sonics lost both Allen and Radmanovic to right ankle sprains Sunday in their 103-81 loss to the Spurs in Game 1 of the Western Conference semifinal series.

Seattle coach Nate McMillan said X-rays were negative for both players and that they would be listed as day-to-day in the best-of-seven series that resumes Tuesday night in San Antonio.

"When you lose two scorers, two guys you're counting on to attack this team, you do lose a little energy," said McMillan, whose team fell behind by 30 points shortly after Allen and Radmanovic were injured in the second quarter.

Sonics center Jerome James had a hard time with the idea of playing without the team's top offensive threat.

"I don't want to even think about not having Ray Allen right now," said 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."

In the first round against Sacramento, James averaged a surprising 17.2 points and nearly 10 rebounds in five games. On Sunday, he had four points on 2-for-8 shooting and only two rebounds.

Danny Fortson said there are other players that Seattle can call on as well.

"We know how to pump guys up and get them ready to play," said Fortson, who went scoreless while committing four fouls in just 3 minutes of playing time. "We know we can wash this away and come back and win in a couple of days, and if we do that, we're back in business."

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

Allen, an All-Star who averaged 32.4 points in the Sonics' first-round win over Sacramento, was hurt driving to the basket.

"He means to them what Timmy (Duncan) means to us," Spurs coach Gregg Popovich said. "He's huge and makes the whole team confident."

Radmanovic rolled his ankle while defending Brent Barry and had to be carried from the court by teammates.

Tony Parker matched his career playoff high with 29 points for the Spurs, 11 of them coming in the first quarter.

"Tony was awesome in the first quarter," said Duncan, who scored 22 points. "He was aggressive right out of the gates. He found the seams and got right to the basket."

Glenn Robinson added 16 points for the Spurs. Rashard Lewis led Seattle with 19 points and Antonio Daniels had 15.

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 a 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. Radmanovic had a stress fracture in his lower right leg in March and missed the final 19 games of the regular season. He played in all five first-round games against the Kings, averaging 6.4 points and 3.6 rebounds.