The leaders of the world's largest economies on Saturday backed an overhaul of the global body that regulates international trade disputes, ahead of high-stakes talks between U.S. President Donald Trump and Chinese President Xi Jinping aimed at defusing a trade war.

The Group of 20 industrialized nations called for reforms to the crisis-stricken World Trade Organization in a final statement from a two-day gathering in Argentina, marking a victory for Trump's drive to overhaul the trade body.

Officials expressed relief that an agreement on a final statement was reached after negotiators worked through the night to overcome differences over language on climate change.