U.S. President Donald Trump said on Wednesday he would be willing to extend a July 8 deadline for completing trade talks with countries before higher U.S. tariffs take effect, but did not believe that would be necessary.

U.S. and Chinese negotiators agreed to try again to implement the trade war truce that had collapsed after it was reached during an earlier round of talks in Geneva.

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.