Liverpool defender Emiliano Insua admits their set-piece defending hasn't been good enough this season.

With 18 goals having already been shipped in 12 league games this season, Insua knows the emphasis is on regaining the watertight nature which has been the hallmark of Liverpool's defence over recent years.

"I'm not sure why our record hasn't been as good this season," Insua told liverpoolfc.tv.

"Maybe it's partly down to concentration. But it is also clear that we are conceding too many goals from set-pieces.

"We know we have to improve in this area. The players and the staff have to work to try and find a solution."