Lavrov added that the summit would provide a good opportunity for the two leaders to talk about the Syrian conflict.
Putin and Trump likely won't have trouble finding things to talk about.More news: Mayor promises Stanley Cup parade, but plans unclear so far
When asked whether the president would bring up Russia's interference in the election with Putin at their meeting, McMaster said there is "no specific agenda" yet, and that Trump will address what he chooses.
Putin said in March he was ready to meet with Trump at the G-20 meeting, though neither Washington nor Moscow have confirmed an official meeting.
One possible "deliverable" under consideration is returning the two compounds - one in Maryland and one in NY - formerly used by the Russian government. If the two men meet, it will be their first face-to-face encounter. He said he got to know Putin "very well" when they both appeared - in separate segments - on an episode of "60 Minutes" and that they had communicated "directly and indirectly". But the official said members of Trump's national security team remain concerned about the optics of a formal sitdown at this stage.More news: Macron's party leads in French parliamentary elections
Those relations reached a post-Cold War low under Trump's predecessor, Obama.
"We assume that a meeting will take place, given that the two presidents will be in the same town at the same time, same building, even the same room". Trump has yet to meet Putin face-to-face, and as Lavrov pointed out, it'd be very odd for the U.S. to deliberately avoid such a meeting when they're in the same room. "It won't be right, I guess, if they aren't able to talk there and to discuss a lot of issues".
"I think, first, we need to normalize dialogue so that it would be based on the key interests of both Russian Federation and the United States", Lavrov said, according to the Tass state news agency.More news: Super Sunday for Srikanth