Brentford defender James Tarkowski says they must be clinical at Middlesbrough on Friday if they are to progress to the Championship play-off final.
The Bees travel to Teesside having lost the first leg of their semi-final tie 2-1 at Griffin Park last week.
"We know we are good enough to go up there and beat them," the 22-year-old told BBC London 94.9.
"We have plenty of goals in the team - it is just making sure we take our chances when we get them."
The Bees dominated the second half of the first leg in west London last Friday but were beaten by a stoppage-time goal from Fernando Amorebieta.
Brentford scored 10 more league goals than Boro during the course of the season and Tarkowski thinks they possess the creativity to overturn the first-leg deficit and reach Wembley.
"We have real game-changes in the team with Alex Pritchard, Alan Judge and Jota," the centre-back added.
"We have got to keep moving the ball and hopefully we will get our chances from there.
"You see that one slight error or one bit of very good play can decide games."
Brentford lost 4-0 to Boro at the Riverside in September but Tarkowski says that defeat was a turning point in their season.
"It was probably the toughest day of the season and we got a real lesson that day," he said.
"But it brought us together as a team and we have come a long way since then. Going up there now, we can go with confidence."
Friday's match at Middlesbrough could be the final match in charge of the Bees for manager Mark Warburton, who will leave Griffin Park at the end of the season following a disagreement over the club's future recruitment strategy.
"It would be great to do it for the gaffer as we all know what is happening at the end of the season," Tarkowski said.
"The better we do, I'm sure the better it is for him looking for a job in the off-season."