Vladimir Putin has described Donald Trump's sanctions against two major oil firms as an "unfriendly act".
However, the Russian president has insisted the tightened restrictions won't affect the nation's economy, a claim widely contradicted by most analysts.
In a major policy shift, Mr Trump imposed sanctions against Rosneft and Lukoil - Russia's biggest oil companies - on Wednesday.
The White House said this was because of "Russia's lack of serious commitment to a peace process to end the war in Ukraine".
Putin has now warned the move could disrupt the global oil markets, and lead to higher prices for consumers.
A meeting between the two leaders had been proposed in Budapest, but Mr Trump said he had decided to cancel the talks because "it didn't feel right to me".
Speaking from the Oval Office, he told reporters: "I have good conversations. And then, they don't go anywhere. They just don't go anywhere."
Giving a speech in Moscow, Putin said "dialogue is always better than war" - but warned that Russia will never bow to pressure from abroad.
Earlier, his long-term ally Dmitry Medvedev had described Mr Trump as a "talkative peacemaker" who had now "fully embarked on the warpath against Russia".
Oil prices have witnessed a sizeable jump since the sanctions were announced, with Brent crude rising by 5% - the biggest daily percentage gains since the middle of June.
In other developments, Lithuania has claimed that two Russian military aircraft briefly entered its airspace on Thursday.
A Su-30 fighter and Il-78 refuelling tanker were in the NATO member's territory for 18 seconds, and Spanish jets were scrambled in response to the incident.
Russia's defence ministry denied this - and said its planes did not violate the borders of any other country during a "training flight" in the Kaliningrad region.
Volodymyr Zelenskyy attended a European Council summit in Brussels to discuss the war in Ukraine - and said the meeting had delivered "good results".
He said Ukraine had secured political support for frozen Russian assets and "their maximum use" to defend against Russian aggression, adding the EU would "work out all the necessary details".
Mr Zelenskyy thanked the bloc for approving its 19th sanctions package against Russia earlier today, and said Ukraine was already beginning work with European nations on a 20th.

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