It's going to be a battle of undefeated heavyweights when two of major college football's 21 unbeaten teams go head-to-head Saturday, Sept. 29 as the Orange (4-0, 1-0 ACC) journey into Death Valley for a showdown against Atlantic Coast Conference rival No. 3 Clemson (4-0, 1-0 ACC). Kickoff is set for noon, and the game will be televised nationally on ABC.