Villarreal striker Gerard Moreno fears his side's Copa del Rey dreams could go up in smoke on Wednesday night if Barcelona's star-studded attack perform like they did against Athletic Bilbao at the weekend.
Gerard Moreno: Wary of in-form Barcelona
Lionel Messi, Neymar and Luis Suarez were all on the mark as Barcelona put on a superb display to humble Athletic 5-2 at San Mames.
Messi and Neymar also scored as Barcelona beat Villarreal 3-2 in the league earlier this month.
Moreno knows what fate could befall his side in the first leg of the semi-final at the Nou Camp if the Catalan club's all-South American strikeforce hit their straps again.
He told Catalan radio station Esports Cope: "I saw the game against Athletic Bilbao, they are very good, the three up front finished off the moves very well.
"If you play against them in those moments, you know you have a good chance of losing.
"It's difficult (to beat Barcelona) but we're going to try. We will go out with high hopes and respect and try to score there, while being conscious that Barca have the best players in the world."
Villarreal led twice at the Nou Camp in the February 1 league game between the sides, before two goals at the start of the second half from Rafinha and Messi saw Barcelona take a 3-2 lead that they never relinquished.
That was one of nine successive victories Barcelona have recorded in all competitions since losing to Real Sociedad in their first game of 2015 - but coach Luis Enrique is keeping his feet firmly on the ground.
He also knows Villarreal, who are sixth in the Primera Division, are likely to pose another major test for his side as they look to reach the Copa del Rey final.
"We've won nine games, but we still haven't done anything yet," Enrique said at his pre-match press conference.
"Like the league game (against Villarreal), the objective is to win. It's important not to concede, but the first objective is to win and be better than our opponents.
"Villarreal are having a great season and the game presents many difficulties."