A three-team race for the top spot in the Big Ten between Michigan State, Purdue and Michigan is heating up. So, too, is a battle for a top-four seed in the Big Ten Tournament.

The Big Ten basketball standings received a shake-up this week as first-place Michigan State dropped its first game of the season.

This story was updated to add new information. A busy week in the Big Ten created significant volatility in the conference standings. Several top teams saw their records blemished, including Purdue (1-1 with a loss to Ohio State ),

Iowa, Illinois and Indiana all made jumps, while Michigan and Minnesota took tumbles in the latest Big Ten women's basketball power rankings.

What had already been a recent run of bizarre games in the Big 12 Conference turned even more psychotic on Saturday. There were player and coach ejections, a snubbed postgame handshake, a massive second-half comeback and two huge upsets by road teams to snap the home teams' long winning streaks on its court.