Rayo Vallecano coach Paco Jemez has criticised Celtic's approach to their Champions League clash with Barcelona, insisting he would be ashamed to adopt those tactics when Rayo face Barca in La Liga on Sunday.
Celtic were heavily scrutinised following their 2-1 defeat at the Camp Nou after conceding almost 80 per cent of possession and 26 attempts on goal during the match.
After grabbing an early goal through Giorgos Samaras, Celtic switched their focus to defence and rarely gained control of the ball. Jemez believes that negative style of football will not yield a result for his side against the La Liga leaders and would deter many supporters.
"I could use the same approach as Celtic, but personally I would be too ashamed to look fans in the eye," Jemez said. "We would also get torn to pieces on the pitch. I don't want them to watch Barca dictate the game. We might lose, but we'll decide how we play against them.
"Barca is a team that can adapt to whatever pitch it plays on, regardless of the difference in size, play well and win. We have to believe we can win. We all know how difficult it is to beat Barca, but it's not impossible.
"No one has come away with a victory so far, but no team in the world is unbeatable. Why can't it be us on Saturday? We will have to be at our best and believe we can cause them problems and keep the ball. We're up against one of the best teams in the world and that is something that satisfies us."
Barcelona suffered a blow on Friday with Javier Mascherano suspended for the trip to Rayo despite appeals from the Catalan giants to have his red card from last weekend rescinded.
But despite the midfielder's absence, Barca still possess attacking potency and Jemez is adamant he will employ a well-rounded defensive tactic to break down their opponents rather than focusing on Lionel Messi.
"Let's suppose we contain Messi. If we think that is enough to go on and win the game, we are mistaken," he said. "Messi can pop up at any point and that's why he's the best in the world. But we also need to stop the likes of Fabregas, Pedro [Rodriguez], Alexis Sanchez and others."