Burnley midfielder Steven Defour admits they need to be sharper in front of goal.

The Clarets travel to West Ham United this weekend on the back of successive defeats to Manchester City and Chelsea in which they've conceded nine goals and scored none.

"For the moment it's not really going for us," said Defour.

"If you look at last season it all went for us, now it's going against us a little bit. We have small opportunities like Corky (Jack Cork) and Vokesy (Sam Vokes) last weekend, but then you see how clinical Chelsea were.

"We have to be more clinical at both ends of the pitch, we've got some of the good play from last year but we have to do it for a full 90 minutes like we did last year.

"We're working on it, everybody is getting back now, people are getting fitter, it will work at some point."