San Antonio and Phoenix picked up victories Friday, while Sacramento dropped back level with New Orleans.
Over in the Eastern Conference, the Orlando Magic pulled ahead in the fight for the No.
Since Miami plays Denver and Indiana faces Philadelphia, Boston may not give up any ground after the first full set of games.
The Blazers take on Boston Sunday and then face Houston, Denver the Los Angeles Clippers and Philadelphia before closing with Dallas and Brooklyn.
If Memphis, Portland and San Antonio want to hold off the Pelicans, they need to win whichever head-to-head meetings remain and pick up another victory or two at least.