Auburn and Iowa State extended their winning streaks this week to nine and 12 games, respectively, further entrenching themselves at the top of the men's college basketball power rankings as both handled top-15 opponents at home with ease -- Auburn against No.

Houston (5-12, 1-5 Big 12) delivered the biggest upset of conference play so far when it earned a 79-76 home win over OSU on Tuesday. Kierra Merchant scored a game-high 20 points for the Cougars, who led by as many as 26 points.

Once again this week, it’s a three-way tie for the lead atop the Big 12 Conference basketball standings. And while the top three in this week’s power rankings remain the same from the week before, there was quite a bit of movement from fourth on down to the very bottom.