LONDON, June 9 (Reuters) - Top U.S. and Chinese officials will sit down in London on Monday for talks aimed at defusing the high-stakes trade dispute between the two superpowers that has widened in recent weeks beyond tit-for-tat tariffs to export controls over goods and components critical to global supply chains.

High-level delegations from the United States and China are meeting in London to try and shore up a fragile truce in a trade dispute that has roiled the global economy

China's exports to the United States sank fell nearly 10% in May from a year earlier, new customs data show, adding to pressure on the world's second largest economy as a new round of trade talks with Washington was due to start later Monday in London.