Ebou Adams scored his first goal for Derby to boost their automatic promotion hopes with a 1-0 win over Blackpool.
Derby went with an attacking formation but the first clear chance fell to Blackpool in the 29th minute, with George Byers scuffing a shot wide from 15 yards.
It brought an instant response from Nathaniel Mendez-Laing, whose curling shot was touched behind by Daniel Grimshaw and the corner was almost forced in at the near post.
But Grimshaw could do nothing in the 40th minute when a cross was half cleared to Adams, who scored with a first-time shot from the edge of the area.
Derby should have added a second in the 55th minute when Mendez-Laing put Conor Washington through on the right but he failed to beat Grimshaw.
Blackpool almost took advantage in the 71st minute through a Sonny Carey free-kick which Rams keeper Joe Wildsmith clawed away.
There was another late scare for Derby when Kyle Joseph twice had goalbound shots blocked by Curtis Nelson and Eiran Cashin.
