The EU will "not be intimidated" by threats about the UK leaving with no Deal, Donald Tusk has said.
The European Council president told the European Parliament that in the Brexit talks "a no deal scenario would be bad for everyone but above all for the UK".
He said the "goal is a smooth divorce" with the UK and EU as "good friends"
He told the last meeting of the European Parliament before the UK triggers Article 50 that it was "carefully preparing" for Brexit and "it is our wish to make this process constructive and conducted in an orderly manner".
But he warned: "However, the claims, increasingly taking the form of threats that no agreement will be good for the UK, and bad for the EU, need to be addressed.
"I want to be clear that a 'no deal scenario' would be bad for everyone, but above all for the UK, because it would leave a number of issues unresolved.
"We will not be intimidated by threats - and I can assure you they simply will not work.
"Our goal is to have a smooth divorce and a good framework for the future - and it is good to know that Prime Minister Theresa May shares this view."
Mr Tusk also stressed that he would "do everything in my power to make sure that the EU and the UK will be close friends in the future", adding that "Britain will be dearly missed as an EU member state".
"At the same time, I would like to stress again that the EU's door will always remain open for our British friends," he said.