Villas-Boas is trying to bounce back from the worst start made to a season by a Blues manager since Roman Abramovich bought the club, something that has sparked intense speculation about the safety of his job. That will only increase if good friend Emery helps dump Chelsea out of the Champions League in Tuesday night's do-or-die final Group E game at Stamford Bridge. But the Valencia boss insisted Villas-Boas' ideas needed to be given time to take hold, regardless of the outcome. "Coming to a big club like this and trying to implement his style and his game takes time," Emery said. "With the way he works, the results will be there in the future. "It's not going to be good, it's going to be very good. I'm sure of that. "They might have struggled a bit so far, but when you want to achieve excellence, as Andre and the club wants, it takes a bit more time." Emery was philosophical about going up against his friend in a match that will see one of their clubs eliminated from the Champions League. "It would have been nice to see both teams through," he said. "There's a final tomorrow - Chelsea v Valencia and one of the two will have to go out." Valencia could hardly be travelling to Stamford Bridge in better form, having won seven of their last eight games. They will also be facing a side who have lost three of their last four home matches and whose defence has looked extremely vulnerable all season. Emery said: "They might have had small problems or doubts in the past, but they scored three at Newcastle at the weekend so we can't count on ups and downs. "We need to put very strong arguments tomorrow to go through. "We respect Chelsea for their greatness, their history, their top-level players and manager, and we can't count on recent form. "But this is an opportunity." In-form midfielder Tino Costa, who has scored four times in the last five games, added: "We've been working to try and spot potential defects, but that's not what we're focusing on. "We're here to play our own game. "We've come here with the mentality to go out there and try and win the game. "We are aware a draw with goals would be good for us, but Chelsea will be coming out to try and win the game, too. "That's what we're trying to do ourselves." As well as disappointment for one of Villas-Boas and Emery, there will be sadness at full-time on Tuesday night either for Chelsea winger Juan Mata or his former Valencia team-mates. Costa said: "The whole squad feels affection for Juan, but we're really motivated by the game in general. "It'll be a special game for Mata, but our motivation is going through to the last 16. That's what we're here to try and do."
