Russian oil exports from western ports are set to fall by some 100,000-200,000 barrels per day next month from July levels, a sign Moscow is making good on its pledge for fresh supply cuts in tandem with OPEC leader Saudi Arabia, two sources said on Friday, citing export plans.

Saudi Arabia and Russia, the world's biggest oil exporters, deepened oil cuts on Monday, sending prices higher despite concerns over a global economic slowdown and possible further interest rate hikes from the US Federal Reserve.