The Sky Blues will face last season's playoff final runners-up on Sunday as they seek to stretch their unbeaten run at Sixfields to five games.
Pressley has said that while Uwe Rosler's side are a strong outfit, Coventry are capable of securing a win.
"They have just forked out over £300,000 for a new striker [Will Grigg] so that shows the level of investment Brentford are making at the moment," Pressley told Coventry's official website.
"They are serious players this year, no doubt about it. But, I believe the way we have gone about things this season shows we can get a result from anyone in the league.
"Our players have been giving everything to the club this season and I am really proud of that. We beat anybody and I'm sure our opposition knows that."
Coventry currently sit 20th in League One, while Brentford occupy 10th place.