Donald Tusk has poured cold water on hopes of a Brexit breakthrough at Wednesday's EU summit, saying the Irish border was still a sticking point.
And he called on Theresa May to come up with "concrete proposals" to break the "impasse".
The prime minister told her cabinet a deal was within reach if the government "stand together and stand firm".
Asked if she would be coming forward with "concrete proposals" at the summit, Mrs May's official spokesman said: "The prime minister set out her position yesterday (Monday). She looks forward to a face-to-face discussion with him tomorrow.
"There are many areas where we have made progress. More progress is needed on the backstop."
BBC News.