The two EU leaders did not hold back in their criticism of Britain as they held a joint press conference following talks at the EU Summit on Friday morning between the 27 remaining member states, without Theresa May.
In a not so subtle dig at the UK, Mr Tusk, who was re-elected as European Council President on Thursday, said: “The best motto for today’s meeting could be ‘if you want to go fast go alone, if want to go far go together’.
“This was the motto today in the room.”
Mr Juncker, the Commission President, appeared to still not understand Britain is leaving the UK, and is set to trigger Article 50 as early as next week.
He said: “I don’t like Brexit because I would like to be in the same boat as the British, the day will come when the British will re-enter the boat.”
The Luxembourgish politician said Brexit “is not the end of the EU or our ambitions”.
He added: “I have the impression the Brexit issue is encouraging the others to continue – unfortunately without the British.
“I’ve seen all the member states say this, the approval of European integration is supported.
“I regret it but it’s not the end.”
The pair said this morning’s meeting focused on a push towards a “multi-speed” Europe where some members want “systemic changes” while others want “deeper integration”.
Both of them were keen to emphasise they did not want an EU where some countries are favoured over others, as had been implied yesterday.
Mr Juncker, said: “I have noted that for some of us this is seen as introducing a new dividing line, a new kind of iron curtain between east and west, that’s not the intention.
“The white paper says the starting point is to move together as a union, that’s the principle.
“The treaties of today will be the treaties of tomorrow.
“All the member states are involved but only those who want it can vote. This already exists with Schengen and the euro.”