ANN ARBOR -- Trey Burke had 18 points and eight assists, and No. 1 Michigan was nearly flawless at the start Wednesday night en route to a 68-46 victory over Northwestern. The Wolverines made 10 of their first 11 shots and went the entire first half without a turnover. They didn't commit a foul, either, until the final minute of the half. Michigan took over the top spot in the AP poll this week for the first time since the 1992-93 season. The Wolverines can now prepare for Saturday night's showdown at No. 3 Indiana. Michigan played without forward Jordan Morgan, who sprained his right ankle last weekend.