Florent Malouda insists Chelsea's 6-0 thrashing of West Brom shows they are determined to improve even on last year's dominant domestic display.
The 2009-10 double winners endured a tough pre-season but kicked off the defence of their Barclays Premier League campaign by hammering the newly-promoted Baggies with a Didier Drogba hat-trick, a brace from Malouda and one from Frank Lampard.
The French midfielder told ESPN: "We are champions and we have to improve what we did last season.
"We had a great record and scored a lot of goals but it's a new season and we have to work harder and be even better than last year.
"It was not easy at the beginning because we had a difficult pre-season, to score early in the game was most difficult thing to do and after that we had to carry on to score more goals."