NATO chief Mark Rutte has said he told Ukrainian President Volodymyr Zelensky that he needs to find a way to restore his relationship with President Donald Trump after Friday's White House clash.

'It is important that President Zelensky finds a way to restore his relationship with the American President and with the senior American leadership team,' Rutte told the BBC on Saturday, commenting on a call he had with Zelensky on Friday.

He described the meeting at the White House as 'unfortunate'.

Rutte's dire warning to the war-time president comes as Zelensky duked it out with Trump and Vice President JD Vance in the Oval Office over the conditions of a possible ceasefire with Russia.

Tempers flared on all sides, with Trump threatening to abandon Ukraine completely if Zelensky didn't agree to his peace terms.