Ireland coach Eddie O'Sullivan admitted his side had won an "ugly" victory as they kicked off their RBS Six Nations campaign with a 26-16 win over Italy.
Paul O'Connoll admits that Ireland will have to step up a gear
"In the first 20 minutes we really hadn't much ball and didn't get into many attacking positions," he said.
"They got their confidence out of that and they took the game to us. It was an ugly game of rugby by any standards."
Brian O'Driscoll added: "If you go to the Stade de France and play like that you're going to get obliterated."
Man-of-the-match Paul O'Connell also admitted that Ireland were well off the pace.
"It was a very tough game. We probably didn't play that well but they played very well," O'Connell told BBC Sport.
"They put us under a lot of pressure. We are going to have to make a big step up and improve next week in France.
"In some ways they have a very strong 22 players and they can rival anyone. They were mightily pumped up."
O'Connell is hopeful that the Irish can turn up the volume for the trip to Paris.
"We were miles off where our ambitions are but next week hopefully we can turn things around and put in a big performance," he said.