Hull have reached the Championship final, after surviving a scare against Derby.
They lost 2-0 on the night at the KC Stadium, but win the tie 3-2 on aggregate.
Steve Bruce's side had come into the match with a 3-0 advantage.
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But Johnny Russell poked Derby in front after just seven minutes tonight, before an Andrew Robertson own goal set up a tense finish.
But Hull hung on and they will face Sheffield Wednesday for a place in the Premier League at Wembley next Saturday.