Clarke Carlisle believes Burnley have the ability to dash West Ham's FA Cup dreams on Monday.
A recent resurgence from the Clarets, under the guidance of new boss Eddie Howe, means there are just eight places separating the two clubs in the league standings.
Burnley find themselves within touching distance of the Championship play-off places, while West Ham continue to languish towards the foot of the Premier League.
With confidence flowing again, the Clarets will head to Upton Park believing a place in the last eight of the FA Cup is up for grabs.
Centre-half Carlisle feels they are capable of reaching the quarter-finals, with Howe's squad packed with potential match-winners.
"There would be no point turning up to a game if you didn't have the belief you could win," he said.
"And I think we have strong grounds for a belief. We are in good form at the minute, the squad is feeling confident.
"We have enough quality within our ranks to cause any team in the land a problem."