The PM struck a confident tone on reaching a Brexit deal, telling the paper he thinks “we will get there” and that a “huge amount of progress is being made”.
He said: “I will be talking to Jean-Claude about how we’re going to do it. I’m very confident.
“When I got this job everybody was saying there can be absolutely no change to the Withdrawal Agreement, the backstop was immutable, the arrangements by which the UK was kept locked in to the EU forever, they said no-one could change that.
“They have already moved off that and, as you know, there’s a very, very good conversation going on about how to address the issues of the Northern Irish border. A huge amount of progress is being made.”
Escargot, salmon and fromage will be on the menu when Johnson and Juncker meet for lunch on Monday.
The PM, accompanied by Brexit Secretary Steve Barclay and Number 10’s Brexit sherpa David Frost, will also meet the EU’s chief negotiator Michel Barnier during the Luxembourg visit.
However, Downing Street has cautioned that Monday’s meetings will not be a “big breakthrough” moment in the government’s bid to strike a deal with Brussels.
Ahead of the trip, Johnson added: “Don’t be fooled by (Labour leader Jeremy) Corbyn and the ringleaders. On the one hand, they say I don’t want a deal.
“On the other, they want to force me to extend. Both are wrong. I am straining to get a deal, but I will also end the uncertainty and take us out on the October 31.”
It came as research by Opinium suggested the Conservatives have increased their poll lead to 12 points above Labour.
The pollsters put the Tories on 37%, with Labour on 25%, the Liberal Democrats on 16% and the Brexit Party on 13%.