PHILADELPHIA - Allen Iverson has a simple explanation for Philadelphia's perfect start: The 76ers are "believing in each other."

That helps some, for sure. So do three straight 30-point games from Iverson, near-flawless shooting from 3-point ace Kyle Korver, and a tightened defense.

Iverson had 31 points and 13 assists, Korver scored 13 of his 22 points in the third quarter, and the 76ers beat the Miami Heat 107-98 on Sunday to improve to 3-0.

Andre Iguodala scored 20 points for the surprising Sixers, the only undefeated team in the Eastern Conference.

"We've got to keep on building on what we've been doing," said Korver, who was 5-of-6 from 3-point range. "We have a long ways to go, but we feel like we're doing OK right now."

In other games, it was: San Antonio 103, Toronto 94; Atlanta 95, Orlando 82; New Orleans 96, Houston 90, and Seattle 117, the Los Angeles Lakers 101.

Korver rallied the Sixers with his 3s in the third quarter and helped them build a 17-point lead midway through the fourth against a Heat team that played without Shaquille O'Neal.

O'Neal bruised his left knee in Friday's victory over New Jersey and is day-to-day. Heat coach Pat Riley said O'Neal would have X-rays when the team returned to Miami.

"Not having Shaq changed our whole game plan," Riley said. "We were a little surprised that before the game we found out he wasn't going to play."

Antoine Walker scored 23 points, Udonis Haslem had 17 points and 16 rebounds, and Dwyane Wade added 20 points for Miami.

O'Neal would have made little difference against Korver. The former starter has found his niche this season off the bench, hitting clutch shots with such frequency that his minutes haven't really been affected.

Korver got hot in the third, sinking three 3-pointers to extend his streak to nine straight overall going back to Friday's win in Orlando. The streak ended when he missed a baseline attempt in the fourth.

"Kyle has just been off the charts the first three games, the way he's been shooting the ball," Sixers coach Maurice Cheeks said.

Philadelphia had 26 assists and only eight turnovers, and outrebounded the Heat 43-40.

Chris Webber had 11 of those rebounds for the Sixers, including six in the third, but continued to slump from the floor, with a 5-for-13 effort for 10 points. He was benched for the entire fourth quarter. Starting center Samuel Dalembert also was held out of the fourth and Korver was scoreless in the period.

Webber deftly deflected numerous questions about his benching, smiling through brief answers and saying he was happy the Sixers were 3-0.

"It's whatever," he said.

Alonzo Mourning struggled filling in for O'Neal, picking up his fourth foul early in the second quarter and was a nonfactor with six points. Dorrell Wright set a career high with nine rebounds, but had none in the third when the Sixers outrebounded the Heat 13-7.

"We hurt ourselves out there," Mourning said. "We didn't do anything to alter their play down the stretch. We let them get into a comfort level."

Now the Sixers seem quite comfortable sitting atop the East.

"We played three games and we won three games so you know that has to be exciting for us," Cheeks said.