Bradford City boss Phil Parkinson has said his team can not afford to set out to simply defend their first-leg lead over Aston Villa in their Capital One Cup semi-final second leg.
The Bantams have a two-goal advantage going into the game at Villa Park after winning 3-1 at Valley Parade.
Paul Lambert's side have conceded 24 goals in their last nine fixtures.
"They carry a real threat going forward but their weakness is defensively," Parkinson told BBC Radio Leeds.
"It would be foolish for us to go there to defend for 90 minutes.
"We have to carry a threat ourselves and we certainly will. The best way for us to progress is to score and we will endeavour to do that."
Villa's defensive frailties were shown up again at the weekend when they conceded two second-half goals to let a two-goal lead slip against local rivals West Brom.
The Bantams boss is confident that his side have the strength to stand up to what is likely to be an attacking performance from the Premier League side.
"I've used the word desire a lot this season and we have got that in an abundance," he continued.
"One thing for the game is that if things go against us at any stage we won't give in, and if players are tiring then we'll have three subs who will come on and give us every chance."
Because of the freezing weather conditions in the UK, the League Two side have been forced to re-arrange their travel plans and trained at the national centre of excellence St George's Park in Burton on Monday.