Iowa guard Mike Gesell, center, fights for the ball with Michigan State's Alvin Ellis III, left, and Matt McQuaid, right, during the first half of an NCAA college basketball game Tuesday, Dec. 29, 2015, in Iowa City, Iowa. (AP Photo/Charlie Neibergall)

Iowa upends No. 1 Michigan State 83-70

IOWA CITY, Iowa (AP) — Michigan State discovered just how tough things can be without do-everything star Denzel Valentine. Mike Gesell score…