Each week for the remainder of the college basketball season, The Oregonian/OregonLive will release weekly Pac-12 power rankings.
Click here for last week's installment.
After the first week with three Pac-12 teams in the top 10 of the AP poll since 1999, both UCLA and Oregon are out after road losses, while Arizona moved up to No. 5 overall.
All sights are now set for Saturday's major showdown between Arizona and Oregon at Matthew Knight Arena.
1. Arizona (20-2, 9-0)
Last week: Won 79-62 vs. Washington State, Won 77-66 vs.