CBI director-general Dame Carolyn Fairbairn said they could not afford to give up on negotiations and called on both sides to exercise "tenacity, common sense and compromise".
Brussels intends to continue talks next week. He didn't say they won't keep on talking.
"As of tomorrow I will be speaking with my counterpart David Frost".
As he grapples with a accelerating second wave of the novel coronavirus outbreak, Johnson will ultimately have to make the final call on whether to accept a narrow trade deal or go for a more tumultuous no-deal that he would seek to blame on the EU.
"That's what I have proposed to the British team", Barnier said.
Johnson had set a mid-October deadline for a breakthrough in the talks and his intervention is seen as part of the pressure tactics.
"It does seem curious that after 45 years of our membership they can offer Canada terms they won't offer us", he said.
Frost also scoffed at the EU's charge that only Britain should budge, calling it "an unusual approach to conducting a negotiation".
Johnson's planned statement comes after the passing of his self-imposed deadline of 15 October. "This of course means that we, too, will need to make compromises", she said. "This effort must be reasonable", Barnier said. "There were none for the withdrawal agreements, there are none for the future relations, but unanimous support for our negotiator Michel Barnier", Macron said.
"We are close to a deal".
In a surprising twist, as the summit got underway she was forced to leave the venue and self-isolate after a member of her office tested positive for coronavirus.
Johnson had set the European Union summit as a deadline for a deal but he is under pressure after fresh warnings that British companies are far from ready for the consequences of a cliff-edge divorce, when a post-Brexit transition period ends on December 31.
But the British side has accused Brussels of trying to force concessions by running down the clock.
The spat is a sign that the seven months of negotiations between the two sides over their future relationship are heading for what could be a key turning point.
Britain ramped up tensions without definitively making good on Johnson's threat to walk away from negotiations if a deal was not struck at the European Union summit which ended Friday. If an agreement can not be reached, trade would default to World Trade Organization rules, and tariffs and customs checks would be enforced.
"There's a deal to be done, but there needs to be flexibility on both sides, energy and goodwill and political will on both sides, and the prime minister will say more (today)", the foreign secretary told BBC Radio 4's Today programme.
Johnson has repeatedly said that his preference is for a deal but that Britain could make a success of a no-deal scenario, which would throw $900 billion in annual bilateral trade into uncertainty and could snarl the border, turning the southeastern county of Kent into a vast truck park. Brussels in turn stresses that Britain's economy is far more integrated with the EU's than Canada's, and that its single market must be protected from British backsliding.