Charlie Austin's 23rd goal of the season helped Burnley end a five-game winless streak in the Championship with a 2-0 victory over Derby County at Turf Moor.
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But Burnley boss Sean Dyche was just as impressed by his side's defensive showing as Austin's goalscoring prowess, and praised the Clarets' work ethic in securing a clean sheet.
"It was very pleasing," said the Burnley boss.
"I have spoken recently about how the performance levels have been worthy of more points on the board and today there were signs of another good performance.
"I don't think it was quite as routine as people think because Derby are a fair side. They have always got players who can cause trouble and can come alive like they did for 20 minutes in the second half and I thought we came out worthy winners today.
"The clean sheet was appropriate today given that we have had a couple of goals recently that have gone in against the run of play and that can be a bitter pill to swallow but they went about their business well today.
"A lot has been made of Charlie scoring but behind that there are another 10 players and it is important that they are ready to do their job if he has a quiet day.
"We're one loss in seven and we are looking good value for that and if I am being greedy we are better value to have more points than that."
Burnley took the lead five minutes before the break when Austin poked home a deflected shot from close range.
Clarets keeper Lee Grant got down smartly to tip away Michael Jacobs' effort on 60 minutes before Paul Coutts fired the loose ball against the outside of the post.
But the home side doubled their lead when Duff headed home a Ross Wallace corner via a deflection.
Derby manager Nigel Clough insisted he was happy with the overall showing of his side - if not their work at the back.
"I'm not too disappointed with the performance, it's the goals that we are conceding at the moment, both were technically own goals as well," said Clough.
"First half we weren't too good in terms of creating but we certainly restricted Burnley to only a few chances, but there is not a lot you can do when someone is having a shot that is going two yards wide and it deflects into the bottom corner.
"The second one we should have defended better and it was a period of the game when we were on top and pushing for an equaliser.
"We moved Michael Jacobs up with him (Conor Sammon) at the start of the second half and played 4-4-2 which our supporters didn't realise but the team did so that's what mattered.
"We were pushing for the equaliser and we had a chance but it was a good save by the keeper but we hit the post from the rebound and a couple of minutes later it is 2-0 and it's almost game over."