Long-running World Trade Organization talks failed last week because of a conflict between the United States and Brazil.
The US was seen as blocking a deal over farm subsidies, and Brazil is head of a key group of developing nations.
The two countries have already said that a deal could be reached within five to seven months.
Negotiators from the US and Brazil have been meeting in Rio de Janeiro to see if they can revive talks that started more than four years ago in Doha.
"Brazil and the US are leaders in this effort to help revive the Doha round," said US trade representative Susan Schwab.
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US, Brazil Frustrate WTO Talks
Long-running World Trade Organization talks failed last week because of a conflict