Chelsea had the worst possible preparation for next week's FA Cup final when they were beaten 3-0 by Newcastle on the final day of the Premier League season.
Conte was a dejected figure on the sidelines and Sky Sports pundit Jamie Redknapp said he would be amazed if the Italian was still in charge next season.
But Conte's thoughts were on the final against Manchester United and he expressed concern about his players.
Conte said: "For sure we must change, if we think we play a game like this in the FA Cup we don’t have a chance.
"We have six days to change our approach and desire and will to fight.
"For this I am the first person to answer for this as I am the coach of this team and I am the first person to answer for this game."
Invalid email
We use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time. Read our Privacy Policy
He added: “We didn’t play a good game, from the start Newcastle outplayed us.
“Newcastle showed a great desire to fight and take three points and finish the season in the best possible way. For sure we can do better than before.
“I think there was a great frustration because in our mind the will to finish in this season in the best possible way.
“Instead from the start we didn’t show the right will to finish the season in the best way. They deserved to win. I am the first person to answer for this.”