Wendell Carter Jr. added 18 points and Gary Trent Jr. posted 11 points for second-place Duke (23-5, 11-4 Atlantic Coast Conference). The Blue Devils have won four games in a row since falling at rival North Carolina.

Allen, who was the ACC Player of the Week last week, made 10 of 20 shots from the field Wednesday. He drained 6 of 15 3-point attempts on his way to his second-highest point output of the season.

Ray Spalding supplied 17 points and 10 rebounds, and V.J. King and Deng Adel both racked up 10 points for Louisville (18-10, 8-7). The Cardinals lost for the fifth time in seven games.

This result added to a misery-filled week for Louisville, which a day earlier was told it lost an NCAA appeal and must vacate its 2013 national championship.

Duke freshman Marvin Bagley III, the ACC scoring and rebounding leader, sat out a fourth game in a row with what has been described as a mild knee sprain.

Carter had nine boards to help Duke to a 44-30 rebounding advantage.

The Blue Devils began a stretch of three home outings in the final four games of the regular season.

Even losing forward Javin DeLaurier to his fifth foul with 4:56 remaining didn't seem to harm Duke. DeLaurier, a sophomore, made his second career start and scored five points.

Turnovers caused problems for Louisville, sending the Blue Devils to several fast-break baskets.

Duke rolled to a 42-25 halftime lead, marking the largest halftime deficit of the season for the Cardinals.

Allen scored 10 points in the opening 10 minutes.

The Blue Devils built a 26-15 edge, in part putting on a dunking demonstration. Carter's 3-pointer in transition made it 42-21 and caused another Louisville timeout.

Louisville shot 1-for-8 on first-half 3-point attempts and finished 5-for-20 from beyond the arc.

--Field Level Media