England captain Chris Robshaw was bitterly disappointed after his country's chance of a first Grand Slam in 12 years was lost on Sunday.
The openside now admitted that England would need a little bit of luck to win a first title since 2011.
"We're extremely disappointed once again to have let it slip. It's once again out of our hands. We need a bit of luck now," said Robshaw.
"We have to put all of our attention into Scotland and see what happens in the last two games. We know it's out of our control.
"Credit to Ireland – they played well and were pretty smart about how they went about their business. They got the better of us. We were slightly off and they exploited us."
Robshaw was most frustrated with England's discipline, with the normally controlled side conceding 14 penalties overall including eight before half-time.
"Our biggest disappointment was our discipline," stated Robshaw.
"When Ireland have a serious player like Jonathan Sexton who can nail goals and pin you in the corner, you don't want to give them any easy opportunities and allow them to keep the scoreboard ticking over.
"I'm not sure why it happened, but it is something that will be addressed throughout the coming week.
"We conceded some penalties due to pressure and some due to our own loss in concentration. I contributed myself as well.
"As a team you aim for under 10 penalties, that's the benchmark for the 80 minutes. If you do that you're in a good place. We gave away eight penalties in the first half and that pressure tells."