Branislav Ivanovic insists Chelsea must show their quality from the start as they prepare to do battle with Liverpool.
A win for the Blues at Anfield would boost their bid to lift the Premier League trophy but defeat could just about hand the title to Manchester United as one of the closest-run seasons for the championship enters its penultimate stage.
The Serbian defender believes if they play like they have against the big three, which has seen the side win five out of five, then Carlo Ancelotti's men should be the ones to clinch the title.
"We have to win two league games and the FA Cup final and then I can say 'yes, this season for me is very good'," said the 26-year-old
"The most important game of the season is coming up. We will do everything we can on the pitch.
"This team has the quality to win double titles but we have to show it on Sunday and if we play this season like we did in all the big games, then we can hope that we can win and win the Premier League as well."
In the run-up to Sunday's main event, team-mate Nicolas Anelka said he is surprised by his former club's performance this season.
The 31-year-old spent the second half of the 2001/02 campaign on loan with Liverpool, however never secured a permanent deal.
The Chelsea forward feels Liverpool's last minute exit from the Europa League at the hands of Atletico Madrid could work in the Reds' favour and spur them on to get back to winning ways, starting with a victory against the league leaders.
"You never know how they will be affected, maybe they will want a response after losing in Europe and be more determined to win against Chelsea," the Frenchman said.
"I cannot tell you how they will react but it is all about Chelsea - we have to go there and try to win it.
"This season for Liverpool surprises me a little bit because they are a big team with a lot of good players, but sometimes you can have a bad season as a team and you have to accept it, they still have a good squad that can win games."