Blues boss Villas-Boas reiterated failure to win any silverware was "not good enough" at Stamford Bridge and admitted that could cost him his job.

But he made it clear Roman Abramovich would have to sack him because there was no walking away from his three-year project.

He said: "I'd never resign, I'd never give up. It's not part of my education."

Asked if he would deserve to avoid the axe under those circumstances, he said: "You have to ask the owner.

"It's only him who can say if there is that right to continue to portray the future or not."

Abramovich has fired every one of his managers who ended a season empty-handed.

"Failure to win any trophies at a club of this dimension is not good enough," Villas-Boas said.

"It is something we cannot accept and so we have to take responsibility for that, the management, for sure.

"It happened last year, after a double-winning side.

"If it happens this year again, we'll have to reflect more in depth on what is going wrong. There are signs of things you have to avoid."

Villas-Boas has admitted to making mistakes during his first season in charge and said Chelsea - fifth in the Barclays Premier League ahead of tomorrow's trip to West Brom - should be finishing ahead of Manchester United and Tottenham with the players at their disposal.

"We haven't had the results that we should have for the squad we have, and in normal circumstances we would be ahead of those teams," he said.

"We have been underperforming. But we can still improve for the rest of the season."

However, he claimed leaders Manchester City's squad was "a lot better" and suggested his side would only close the gap once Financial Fair Play began to bite.

He said: "I don't think you can compare the two squads, to be fair. I think theirs is a lot better.

"When the top team has access to buy from their title rivals, you can build something extraordinary. We had it in the past and built something extraordinary.

"I think you can't expect Chelsea to buy from City and United."

Villas-Boas admitted the players that may have once joined Chelsea were now choosing City.

"Economic power has a direct influence on choice-making," he said.

"People could have gone to City because of the project that was being built, the super-team being built and put together. Perhaps that's what drove them.

"The numbers being paid are top, are extreme, regarding the league this year.

"With Financial Fair Play, maybe everyone will have better chance of access to those players."

Asked if that was unfair, Villas-Boas said: "I think it's fair. We had it in the past."

Villas-Boas denied performing a U-turn on his claim Chelsea were strong enough to win four trophies and insisted he was right not to make more radical changes before the start of the season.

He added: "There was a direction and message at the beginning which had full acceptance. Everyone was ready, from top to bottom, from club and players and structure.

"When you go through adversity, you raise objections because you have questions as to why it's happening, and you try and improve things.

"But you have to respect this game is highly vulnerable to luck, to madness and to chaos. You can move things you maybe shouldn't have touched.

"On the playing field, there is level of chaos always but you have access to the best talent and, normally, you should win every game."

Villas-Boas claimed he did not know how many new players he felt were needed at Chelsea and reiterated transition was no excuse for failure.

But he suggested Abramovich keeping faith in his project would pay off in the long-term.

"If you look at 2004-2012, this club has won three Premier Leagues and three FA Cups and in three semi-finals of the Champions League and one final," he said.

"If, in the next seven years, we can have that many trophies again, we can reflect on these two years of change and hopefully do something with it. But that's if you portray the future.

"If not, you portray the darkness."