The Houston Rockets easily won their first game without Yao Ming, perhaps because they were riding the emotion that came from learning the All-Star center would miss the rest of the season.

Houston hopes to prove that there's more to the dominating performance than that.

Looking to extend their longest win streak in more than a decade despite the absence of their leading scorer and rebounder, the Rockets go for their 14th consecutive victory when they host the Memphis Grizzlies on Friday.

Rockets general manager Daryl Morey announced Tuesday that Yao would miss the rest of the season - including the playoffs - with a stress fracture in his left foot, leaving the team without one of its best players as it tries to compete for a playoff spot in the loaded Western Conference.

Hours after the announcement, however, the Rockets (37-20) delivered a stifling defensive effort in a 94-69 victory over Washington. They held the Wizards to a Washington franchise-low 23 points in the first half and a season-low point total in winning their 13th straight game.

It's Houston's longest run since opening the 1993-94 season 15-0 en route to its first NBA championship.

"If we continue to play defense and believe, then we really control it ourselves," said Rockets guard Tracy McGrady, who had only 11 points Tuesday but will likely be asked to score much more in Yao's absence. "Everybody is really counting us out, which is cool, but we just have to keep believing."

NBA veteran Dikembe Mutombo, 41, made his first start of the season in Yao's place Tuesday and had four points, six rebounds and four blocked shots in 23 minutes. He made Houston's first field goal of the game and had two blocks in the first quarter.

"I believe I set the tempo early and everybody just followed," said Mutombo, whose effectiveness last season helped the Rockets go 20-12 when Yao was sidelined with a knee injury.

The pressure is on the Rockets to duplicate that success. They're in seventh place in the West and could be in danger of falling out of the playoff picture if they can't adjust to the loss of their franchise center.

"It's certainly going to be hard without Yao, but the season goes on," first-year Rockets coach Rick Adelman said. "They're not going to give us a couple of weeks off to try and figure this out, we've just got to go out there and play."

Houston will put its win streak on the line against Southwest Division rival Memphis (14-43), the only team in the division with a winning percentage below the Rockets' .649.

The Grizzlies lost 127-113 to Phoenix on Tuesday, their season high-tying sixth straight defeat and 12th in 13 games. They last dropped seven in a row from Nov. 4-18 of last season, when they finished an NBA-worst 22-60.

Tuesday's loss overshadowed a career-high 36-point performance from the Grizzlies' Rudy Gay. The second-year forward was drafted eighth overall by the Rockets in 2006 before being traded to Memphis for Shane Battier.

"I am just really happy for Rudy," Grizzlies coach Marc Iavaroni said. "He just had a really good effort. He was doing what he was supposed to do and that is making shots."

Gay was 14-for-27 from the field and 4-for-9 from 3-point range, and is averaging 23.4 points while shooting 40.0 percent (18-for-45) from behind the arc over his last eight games.

Gay, however, has struggled against the Rockets, averaging only 13.3 points and shooting 38.6 percent from the field in three games against them this season. Houston has won two of those games, and six of seven overall against Memphis since the trade.

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