DERBY County's long unbeaten run against Leeds United was ended by a 2-0 defeat at Elland Road.
The Rams had not lost in 12 meetings against their Yorkshire rivals but two goals from Mirco Antenucci gave the hosts all three points from Saturday's Championship clash.
Despite the result, Derby remain top of the table, thanks to Millwall holding Bournemouth to a 2-2 draw.
Steve McClaren's side are at home to Brighton & Hove Albion on Saturday in their next Championship game.
View highlights of the game at Elland Road below.
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