Oldham are besieged by issues heading to the Brentford Community Stadium, with the side bottom of Sky Bet League Two as fans continue to protest against owner Abdallah Lemsagam.
“In football nothing is easy," Bees manager Frank said. “We've seen it so many times that there's been surprises in the Carabao Cup or the FA Cup.
“Premier League sides getting beaten by Conference teams or League Two sides. That can happen tomorrow, so we're very aware of that.
“Of course we are favourites, of course I expect us to win, but I know that Oldham can hurt us.
“We are prepared for this game as good as we were against Wolves and I will put a strong team out there that I 100 per cent think can win the game.
“But we know it's the small things in football that can change so quickly in the game."