It was no more than Derby deserved when Poland winger Kamil Jozwiak finished impressively for his first goal for the club and only the crossbar denied Kazim-Richards a second just before half-time.

Swansea were better in the second half but failed to create a clear chance and missed the opportunity to move into the top three while Derby, who stay in the bottom three on goal difference, kept a clean sheet for the fourth-consecutive game.

Derby began the evening having scored only eight goals in 18 Championship games but they were ahead in the fourth minute.

A Graeme Shinnie free-kick was knocked down by Lee Buchanan and Kazim-Richards reacted before anyone else to stab a shot past Freddie Woodman from eight yards.

Kazim-Richards had a header blocked as Derby's confidence grew and they were close to a second in the 19th minute when Jason Knight's 20-yard shot was touched onto a post by Woodman.

Swansea did not pose a threat in the opening 30 minutes but Andre Ayew did have an attempt on goal two minutes later but it went harmlessly wide.

Derby had been quicker to the ball and they deservedly scored again in the 37th minute when Jozwiak lashed in a shot from just inside the box after Martyn Waghorn laid the ball into his path.

Swansea were lucky not to concede again in stoppage-time when Kazim-Richards thumped a header against the crossbar from a corner.

It was no surprise when Swansea made three changes for the second half and they showed more urgency without seriously threatening Derby's goal.

The game was held up for several minutes after a clash of heads between Buchanan and Ayew but – after treatment – both players were cleared to continue.

Although Swansea had improved, they had not seriously troubled Derby's defence which had been shielded by the impressive Krystian Bielik.

David Marshall twice had to come out and punch clear but he had not been called on to make a save of note with Derby looking comfortable as the clock ticked down.