Barnes and Chris Wood – both celebrating signing new contracts this week - were on target, along with a Roberto own goal.
“It's always nice to put the ball in the back of the net. Unfortunately, I've had a few chances lately that I should have scored that play on your mind," said Barnes.
“But as a striker you keep knocking on the door and I would be more annoyed if I wasn't getting those chances.
“I just need to keep working hard and long may it continue that I can keep producing goals out there.
“Last week was unacceptable and we knew we needed to put it right. We got back to what we are, defending well and pressing from the front and it happened for us.
“It was massive. With an international break coming up we knew we needed to get some points on the board and we've done that and nipped it in the bud by getting the win we needed.
“We came out and it felt we had a different feeling. We were right at it from the start, got our goals, defended magnificently and our game management was spot-on. That's what we set out to do."
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