Dwight Gayle scored his first Derby goal and Louie Sibley bagged a brace in a comfortable 3-0 win over struggling Port Vale.

It keeps Derby second in League One and leaves Vale without a win this year and deep in relegation trouble.

Derby made a lively start and went ahead in the fourth minute through Sibley whose shot took a big deflection to beat Connor Ripley.

The Vale keeper denied Derby a second in the 11th minute with a double save from Nathaniel Mendez-Laing and Max Bird before Tom Barkhuizen fired over from eight yards for the hosts.

Vale appeared to have weathered the storm but they conceded again in the 44th minute with Gayle planting a precision header from 12 yards past Ripley.

Ben Garrity headed a Vale corner wide at the start of the second half but Derby sealed victory in the 58th minute when Joe Ward crossed to the back post and Sibley finished emphatically.

Derby could have added further goals while third-bottom Vale failed to register a shot on target.