Cousins recorded a season-high 27 points and added seven assists to help the Warriors end Houston's nine-game winning streak.
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Harden said he expected Golden State to be aggressive on the court as they were without last year's NBA Finals MVP Kevin Durant in Texas.
Steph Curry also came through with 25 points, including two clutch free throws with 8 seconds left after the Rockets threatened within a point, 104-103.
The Rockets were confident last postseason they could beat the Warriors, but they haven't relished the win in the regular-season series. They've twice lost to them in the Western Conference finals, including last season.
The National Basketball Association, despite the million dollar divas that make up the nightly soap opera, is more similar to life of the common than one realizes.
With their recent struggles, the Warriors are viewing the game differently. On a team with 3 legendary shooters in Curry, Thompson and Durant that is the killing blow.
Harden scoffed when asked about Curry's comment. "That's why I can guard them. I'm anxious about what's in this locker room", he said before walking away.
"It's OK", Harden said when answering a question that started with how the Rockets were on a roll. Even though the Nuggets have looked good in the regular season, they lack the postseason experience of older teams like the Thunder and Rockets. We need that energy, especially this time of the year. Sometimes at home we kind of just relax and think "oh we're gonna win". Clint Capela played 20 minutes in the first half since Nene is pretty much out of the rotation and Kenneth Faried can't handle a skilled center of Cousins' size. 21 after having thumb surgery. Eric Gordon added 17 points while the Houston bench, which played a significant role in a victory over Charlotte on Monday, produced just 18 points.
Cousins came into tonight's game averaging 15.2 points, 7.8 rebounds, 3.3 assists per game on 45 percent shooting from the field.
Cousins had a phenomenal overall game, but what stood out - particularly early - was his passing.
The other player to do so?
"When Kevin is out, we don't have the luxury of throwing to him and getting 30 points", Thompson said after the Warriors snapped the Rockets' nine-game winning streak. So it's good to have multiple guys that can step up every night.
The joy that Kerr wants his team to play with was on display both during and after Wednesday's win as smiles permeated throughout the locker room. Though the Rockets leaned well on James Harden (29 points) and Chris Paul (24), the Warriors held the Rockets to a combined 11-of-41 clip from deep.