The four words you don’t want to hear when it’s late in the season and you’re on the NCAA tournament bubble: Still work to do.That’s the case for Nebraska as it prepares to host Big Ten Conference foe Minnesota on Saturday in Lincoln, Neb.The Cornhuskers (17-11, 7-10 Big Ten) missed a big chance to burnish their tournament resume Monday night, falling 49-46 to No. 15 Michigan. It marked just the third time in the last 11 years that a Big Ten game was won with less than 50 points.Nebraska got nothing offensively from anyone other than Brice Williams, who pumped in a game-high 26 points and is averaging 19.6 ppg. The Cornhuskers made just 16 of 62 attempts from the field, including 6 of 28 from the field.Take Williams and reserve Sam Hoiberg, who made his only 2 attempts, out of the mix and the rest of the team connected on just 5 of 39.”We don’t have a ton of shooting on this team,” admitted Nebraska coach Fred Hoiberg. “We have to stay in games and give ourselves a chance with our defense. That’s been our identity when we’ve played well.”While the Cornhuskers shoot for their first back-to-back NCAA tournament berths in more than 30 years, the Golden Gophers (14-14, 6-11) are just trying to reach the conference tournament. That quest took a step backwards on Tuesday night with a 75-63 home loss to Northwestern.