By Dan Peleschuk and Mark Trevelyan (Reuters) -Ukrainian President Volodymyr Zelenskiy won diplomatic backing from Europe and the NATO alliance on Sunday ahead of a Russia-U.S. summit this week where Kyiv fears President Vladimir Putin and President Donald Trump may try to dictate terms for ending the 3-1/2-year war.

German Chancellor Friedrich Merz said he hopes Ukrainian President Volodymyr Zelenskiy will be involved at the Russia-US summit. Merz said he will have a call with US president Donald Trump on Sunday (Aug 10) in an interview with public broadcaster ARD.

Ukraine will not cede its land, President Volodymyr Zelenskiy said on Saturday, rejecting U.S. suggestions that a deal with Russia could involve swapping territories as Washington and Moscow prepared for talks between their leaders on ending the war.