NBA Last Team to Lose

Going into tonight's games there are only 3 teams remaining who have yet to lose, the Houston Rockets (6-0), the Memphis Grizzlies (5-0) and the Golden State Warriors (4-0). This arises the question, which team can remain undefeated for longer? 

The Memphis Grizzlies play against the injury ridden Oklahoma City Thunder tonight and the rebuilding Milwaukee Bucks tomorrow and are assumed to win both games. The next game for the Warriors and the Rockets are actually against each other tomorrow night so it's guaranteed that by Sunday there will be at least one undefeated team remaining and the winning streak of either the Rockets or the Warriors will come to an end. So assuming the Grizzlies avoid a major blunder come Sunday two teams will be left. If the Warriors win they will then have to beat the Phoenix Suns the next night to keep the streak going and if the Rockets win they will be able to relax until their next game against the Minnesota Timberwolves on Wednesday. Before that game though, on Tuesday, the Grizzlies will have to beat the Lakers and the Warriors will have to beat the defending champion San Antonio Spurs. This leads me to believe that the Warriors will not stay unbeaten for the longest since they face 3 teams quite capable of ending said streak. It's also worth mentioning that the Warriors only won 1 of the 4 possible games last season against the Rockets and their game against them on Saturday is in Houston so I'm comfortable saying that the Rockets and the Grizzlies will be the last two teams to stay undefeated. The Grizzlies may face 3 lower skilled teams for their next games but upsets happen in the NBA almost every night (they'll have to face Kobe one night) and the Grizzlies have issues scoring some nights so simply by having to face more teams the Grizzlies have a harder shot than the Rockets. For these reasons it's my opinion that the Houston Rockets will be the final team in the NBA to remain undefeated.