US President Donald Trump on Friday outlined the first phase of a deal to end the trade war and suspended a threatened tariff hike, but officials on both sides said much more work needed to be done before an accord could be agreed.
The safe havens gained on Monday, however, after Bloomberg News reported that China wants more talks as soon as the end of October to hammer out the details of the "phase one" deal.
US Treasury Secretary Steven Mnuchin also said on Monday that an additional round of tariffs on Chinese imports will likely be imposed if a trade deal with China has not been reached by the time they are set to start, but added that he expected the agreement to go through.
Analysts said the partial deal between the world's two largest economies appeared to lack substance with limited progress on structural issues such as technology transfers.
The dollar index against a basket of six major currencies gained 0.20 percent to 98.501, up from a three-week low of 98.197 reached on Friday.
Sterling also dropped against both the dollar and euro , after Britain and the EU stressed over the weekend that there was a long way to go before they could agree a Brexit deal.
Sterling surged late last week after London and Brussels announced "intense" negotiations to try and agree a Brexit deal before Oct. 31.