Darren Ambrose admits Aston Villa's goal blitz on Sunday left him feeling uneasy but he still thinks Crystal Palace can shock the Premier League side tonight.
Villa warmed up for the fifth-round FA Cup replay by thumping Burnley 5-2 to move within a point of a Champions League place.
Ambrose said: "I watched that game and when they scored four in about 10 minutes I started to get a bit worried. We know they're a good team — they're not fighting for that fourth spot for nothing — but we've got to believe we can compete with them.
"We showed that we can give them a game in the first one at Selhurst Park, so there's no reason why we can't do it again."
The midfelder hit a magnificent free-kick to put Palace 2-1 up in the original clash. However, Ambrose's celebrations proved premature as Villa nicked a controversial equaliser after they were wrongly awarded a corner.
Ambrose said: "It would be nice if I could score another free-kick like the one I hit in the first game. I had a few at the weekend against Coventry that didn't live up to that one."
Palace have already accounted for one top-flight side this season, beating Wolves in a fourth-round replay.
Ambrose added: "Despite being in the relegation zone we know that this is the FA Cup and anything can happen."
