Leeds United left Pride Park with a 1-0 aggregate lead on Saturday evening after they claimed a third win of the season against Derby County.
Kemar Roofe slotted away a superlative Jack Harrison pass on 55 minutes to score the winner as Marcelo Bielsa's men got back to winning ways after a run of three defeats and a draw in their past four games.
Marcelo Bielsa had to name his starting XI without Pontus Jansson after the Swede lost his fitness battle and also saw Adam Forshaw limp off in the first quarter of the match, but the Argentine saw a much-improved display from his side.
Before attention turns to Wednesday night's second leg at Elland Road, what did we learn from the first leg?
LeedsLive's Joe Mewis and Beren Cross gave their pitchside reaction from the Derby County bench in the video above, which also features an under-the-radar post-match act of sportsmanship from the Leeds United staff.
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