Jon Dahl Tomasson has admitted Blackburn Rovers must solve their problem at set-pieces after conceding four more goals against West Brom.

Rovers suffered their seventh defeat in nine Championship games and now have the worst defence in the league, conceding 52 times.

The manner of the goals they gave away at The Hawthorns were particularly frustrating, with set pieces causing issues. The first was a long throw allowed to bounce in the six-yard box whilst the third and fourth were both from second-phase set-pieces to.

Understandably, fans are very unhappy and the run of form and the way the team continues to ship goals. Tomasson admitted it is an issue that the team has to solve.

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"Of course, I  understand the fans' frustrations," he said. "We have to accept that it was not a good day.

"We know coming here the quality of West Brom, the experience and quality players they have. We knew it would be a tough task.

"I thought we started well but I am very disappointed in the manner we gave the goals away. We give away three set-piece goals, things we have been speaking about before.

"That was very disappointing. When Garrett scores that excellent goal in the second half, you think we maybe have a chance and then we concede immediately from a second, third phase set-piece.

"We are very disappointed with those moments. The only positive was to give Sam Gallagher and Joe Rankin-Costello minutes after such a long time out. I'm glad they got minutes in their legs, we haven't been able to rotate for a while.

"We are not happy with losing and the manner we give the goals away is extremely disappointing."

Rovers now have a minus-12 goal difference and aren't scoring enough to compensate for their leaky defence. They have been too easy to play against and the constant concession of soft goals is making their challenge even harder.

"When you look at open play, we were just as good as West Brom but games are won in each box," he said. "The way you defend, are you winning your personal duels?

"Do you win the first or second contact? Are you smelling danger or not? Scoring goals and creating chances, that's football. It is won in each box and that is something we can agree on.

"We do set-pieces every time before a game. We have spoken, normally when you build a squad, you need four good headers in the team, sometimes you can live with three. But if you're small, you can still win headers and duels, we can't forget that.

"It's about making it difficult and we have to do better in those situations."