His UK counterpart David Frost countered that Brussels' insistence that London meet EU demands on state aid and fisheries policy before work on other areas made it "unnecessarily difficult to make progress".
Britain left the EU in January, nearly four years after a landmark referendum to end almost 50 years of European integration.
The Europeans are calling for a final post-transition agreement by October, leaving just two more months to find common ground.
If no deal is struck, ties will default to minimum standards set by the World Trade Organization, bringing higher tariffs and making onerous demands on business which threaten chaos on the cross-Channel border.
(Writers & Editors: DAB-SJW/TXW, Agence France-Presse)
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