Posted by ESPN.com's Adam Rittenberg
IOWA CITY, Iowa -- Quick analysis from halftime at Kinnick Stadium, where Indiana leads No. 4 Iowa 21-7 (upset alert!).
Turning point: After Iowa had closed the deficit to 14-7, star cornerback Amari Spievey muffed a punt and Indiana recovered inside the red zone. It marked the second turnover for Iowa. The Hoosiers converted for a touchdown and took a 21-7 lead to the locker room.
Best player in the half: Indiana junior quarterback Ben Chappell has been terrific so far, completing 12 of 19 passes for 87 yards and two touchdowns. He has made smart decisions and did a great job recognizing the blitz and finding Damarlo Belcher in the end zone with nine seconds left in the half. Honorable mentions go to Belcher and fellow wideout Mitchell Evans.
What Indiana needs to do: Keep the pressure on and forget what happened last week when the Hoosiers blew a 28-3 lead and lost to Northwestern. Chappell should continue to attack, and Indiana shouldn't get away from the run with Darius Willis. The Hoosiers must make Ricky Stanzi win this game and take away the run.
What Iowa needs to do: How about showing up to play? The Hawkeyes look woefully unprepared for this game. This team is used to being behind, but the sloppiness in the first 30 minutes is really uncharacteristic. Iowa needs to force a few turnovers and take better care of the football.