The world economy is at its best point for five years, although the US budget deficit and sluggish European growth pose problems, International Monetary Fund (IMF) head Rodrigo Rato was quoted on Sunday as saying.
Rato also called on the European Union, United States and Japan to widen access to their markets and increase the money they put aside to fund development.
"The world economy is in its best moment of the last five years, but the US budget and trade deficit and low European growth are problems, and variations in energy prices are a risk," Rato said in an interview with Spain's El Pais daily.
The Spaniard, who took the helm at the IMF this year, said earlier this month that imbalances in the United States, Japan and Europe presented the biggest medium-term threat to the world economy.
He also signalled that the lender, better known for trying to keep developing economies on the straight and narrow, would take a larger role in speaking out about policies in the world's richest nations if they posed global economic risks.
"The United States, the European Union and Japan have the great responsibility of putting their own house in order, widening access to their markets and increasing their aid to development," Rato added in the El Pais interview.