Twenty-seven years after Notre Dame last knocked off a visiting top-ranked team in South Bend, the Irish repeated the feat in a double-overtime instant classic.
Ian Book threw for 310 yards and one touchdown and rushed for 68 more as the Irish outlasted No. 1 Clemson, 47-40, to improve to 7-0 on the season.
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The Irish led, 23-10, midway through the second quarter and 23-13 at halftime before Clemson mounted a second-half comeback. Clemson backup quarterback D.J. Uiagalelei found Davis Allen for a 10-yard score to tie the game, 23-23, with four minutes left in the third quarter.