Florent Malouda admits it would be the biggest disappointment of his career if Chelsea fail to wrap up the Premier League title.
The Blues head into the final weekend of the season knowing victory over Wigan at Stamford Bridge will see them clinch their first league title since 2005-06.
And the 29-year-old Frenchman, who was voted Chelsea's player of the year by his team-mates, insists he is not even contemplating anything other than a home win.
"Nobody here even thinks about anything other than a victory. To fail would be a disaster," he said in the Daily Mirror.
"For me, it would be the worst blow in my career, but with our fans at Stamford Bridge behind us we believe that's impossible.
"If you analyse the numbers and statistics in our season, then Chelsea deserve to be champions and yet we know we must still win on Sunday to confirm our achievement.
"We will forget the nerves and we know we will have to play with our heads and be patient. I am totally convinced we will be champions."
If Chelsea do lose at Stamford Bridge, Manchester United could get their hands on a fourth successive league title by beating Stoke at Old Trafford.
Malouda added: "We know Wigan will not give up against us, but our chance of winning the title should be big enough to overcome any obstacle placed in front of us.
"The key to beating Wigan will be to score the first goal. We must not think about Manchester United and for Chelsea the only interest is our match."
Ancelotti was in charge of Juventus when they needed a final-day victory at Perugia in 2000 to be crowned Seria A champions.
However, a 1-0 reverse in torrential rain handed the title to Lazio, and the Italian has warned his players of the horrible feeling they will have to stomach should a similar fate occur.
Top scorer Didier Drogba revealed: "Carlo Ancelotti has told us about how he went through the same experience when he was in charge of Juventus. At least we can't say we haven't been warned.
"Nothing has been decided, but it would be utterly stupid and infuriating for us to miss out with the title so close. I can't bear to think about it."