Kemar Roofe’s second-half winner – his fourth goal against Derby this season – sealed an impressive 1-0 win for visitors Leeds in the first leg of their Championship play-off semi-final on Saturday.
Roofe collected a fine cross from winger Jack Harrison and tucked the ball expertly past Derby goalkeeper Kelle Roos after 55 minutes.
It was Roofe’s 15th goal of the season, who could have doubled his team’s advantage only to be denied by Roos as Leeds came alive following a sedate opening period.
Derby appeared to be thrown a lifeline after they were awarded a penalty with 13 minutes remaining after Harrison appeared to foul Jayden Bogle.
However, referee Craig Pawson controversially overturned his decision and awarded a free-kick to the visitors after consulting a linesman.
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Leeds held on as Derby struggled to create chances, failing to register an attempt on target. The teams meet at Elland Road in the second leg on Wednesday.
Derby will have to do what no other team has ever done in play-off history at this level before – overturn a first-leg deficit after losing at home – to advance to the final.