Watford manager Walter Mazzarri has admitted that his side are conceding too many goals from set pieces this season.

A Jonny Evans header set the Hornets on their way to a 3-1 defeat at the hands of West Bromwich Albion last weekend, bringing their tally of goals conceded from corners to 10.

Mazzarri revealed that he has been working on the training ground all week in an attempt to fix the problem, but hinted that he is not completely settled on a zonal marking system.

"I agree we have been conceding too many goals from corner kicks, which we have been working on all week," he told reporters.

"I decided to mark zonally in the last game because we have been missing many important defenders who can jump a lot. This is the solution we decided to adopt but this same solution can be changed."

Watford will host Everton at Vicarage Road this weekend.