LOS ANGELES, (Reuters) – The Houston Rockets stunned  the top-seeded Los Angeles Lakers 100-92 on Monday to get their  Western Conference semi-final series off to a surprising start.

Yao Ming scored 28 points and had 10 rebounds to help the  fifth-seeded Rockets notch a rare win at the Staples Center.

The Eastern Conference semi-finals also began with an  upset, as the underdog Orlando Magic weathered a storming  comeback from the Boston Celtics to defeat the defending NBA  champions 95-90.

In Los Angeles, Houston survived a 32-point effort by Kobe  Bryant to defeat the Lakers for the first time this season to  take a 1-0 lead in the best-of-seven series.

“We are not going to run with these guys, they are so good  offensively that we had to muck it up,” the Rockets’ Shane  Battier told reporters. “And we did a great job just  controlling tempo.”

Yao briefly left the game in the fourth quarter after  hurting his right knee but returned.

Lakers coach Phil Jackson found much to dislike about his  team’s performance.

“I don’t know if we can play much worse, to be honest with  you,” Jackson said.

The Rockets grabbed an early advantage before fending off  the Lakers for the remainder of the contest.

Los Angeles lost just five home games during the regular  season and looked set to record another win when they took a  77-76 lead with eight minutes to play, but the Rockets  responded with nine consecutive points to secure the victory.

Ron Artest contributed 21 points and Aaron Brooks had 19  for the Rockets, who had lost all four regular-season games to  the Lakers. Pau Gasol followed Bryant with 14 points and 13  rebounds.

Game Two is in Los Angeles today.

In Boston, Dwight Howard grabbed 22 rebounds and 16 points  to help Orlando build a 28-point, second-half lead but Boston  launched a sensational comeback to close the gap to three  points on Paul Pierce’s three-pointer with less than seven  seconds left.

However, the Magic closed out the win with two free throws  from J.J. Redick.

“We let the lead slip …. but there’s plenty of  positives,” Redick, who had 12 points, told reporters. “We got  a big win to start the series and that’s what matters.”

Rashard Lewis chipped in with 18 points for Orlando,  Mickael Pietrus adding 17, and Hedo Turkoglu 15.

Magic coach Stan Van Gundy was happy to get the victory,  but did not like the way his team ended the game.

“We were sort of trying to run out the clock,” Van Gundy  said. “You can’t do that in games like this.”

The Celtics, who host Game Two today, got 23 points  from Pierce. Rajan Rondo chalked up 14 points, 10 rebounds and  eight assists and Glen Davis had 12 points.

The Celtics shot less than 39 percent and turned the ball  over 14 times, seven by Rondo.

“We played flat, we played with no energy in the first  half, but it was not a fatigue factor,” said Boston coach Doc  Rivers, whose team were taken to a Game Seven by Chicago in the  first round.

“We’ve got to be better than that at the start of the  game,” Rivers said. “Clearly, when we put pressure on them it  became a whole different game.”