Deco: Season failure if Chelsea do not win trophy
Deco admits Chelsea's season will be a failure if they fail to win the Premiership or Champions League.
"It will be hard to consider the season a success without at least one of these two titles," he said in the Daily Star.
He also enjoyed a successful four-year stint with Spanish giants Barcelona prior to his arrival at Stamford Bridge, and is determined to replicate those achievements in West London.
"I want to win titles again. This how it's always been in my career, and I think this is the place to be," said the Portugal international.
"We all saw that Chelsea lost both titles to Manchester United last season by a narrow margin. We've got to work, to correct some mistakes and I think the new coach will bring very good things to this club.
"He is a very demanding guy, who works a lot and wants to see everyone doing the same.
"He is a relaxed person off the pitch, accessible and always ready to listen to the players."