SOUTH BEND, Ind. (AP) - Coach Brian Kelly wants to make certain Notre Dame isn't a one-week wonder at No. 1.

The Fighting Irish (11-0) have the top ranking for the first time in 19 years heading into their game Saturday at Southern California following upset losses by Kansas State and Oregon. He went down to the trainers' room to try to get a sense of team's state of mind heading into USC, knowing a win over the Trojans will put the Irish in the BCS title game.

Kelly says the players are taking a business-like approach, knowing it does no good to be No. 1 with a week left in the season if they lose the finale. Kelly says he believes the Irish will prepare for USC as they have for opponents all season.