Vladimir Putin has said Russia can work with Mitt Romney if he is elected US president - even though the Republican candidate has called Russia the United States's "number one geopolitical foe".
In an interview broadcast by the Kremlin-funded Russia Today TV channel, the Russian president said: "We'll work with whichever president is elected by the American people. But our effort will be only as efficient as our partners will want it to be."
Mr Putin expressed concern about how a Romney presidency would affect the long-running dispute over US-led Nato plans to place elements of a missile defence system in Europe.
Russia contends the system could undermine its own defences.
Mr Putin said if Mr Romney is elected "the missile defence system will definitely be directed against Russia".