Volodymyr Zelenskyy's visit to the UK was markedly different from his tense encounter at the White House with US President Donald Trump

Zelenskyy left the White House without signing a deal after President Donald Trump and Vice President JD Vance berated the Ukrainian leader for being "disrespectful," the internationally televised spat drew widespread reactions.

President Trump was positive on relations with China, while he told his cabinet the EU had been formed to "screw" the United States.

The White House said on Tuesday it would decide which media organizations participate in the press pool that covers the president, wresting control away from the group of journalists that has done so for decades.

Finance ministers and central bankers from the G20 top economies gather in South Africa on Wednesday and Thursday, for a meeting marred by the absence or curtailed attendance of key members and disputes over the main issues of climate, debt and inequality.

Volodymyr Zelenskyy openly challenged Donald Trump on his softer approach to Vladimir Putin and urged him to make "no compromises with a killer".