"We can expect that the presidents will meet in Hamburg. The both sides are counting on that. However, no particular agreements have been reached so far," Ushakov told reporters.
Germany is hosting the G20 summit which will be held in the city of Hamburg on July 7-8.
The leaders of Argentina, Australia, Brazil, Canada, China, France, Germany, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, the United Kingdom, the United States and the European Union are expected to attend.