Oil benchmarks fell around 4% on Monday following rising concerns of increased coronavirus cases.
Both crude oil benchmarks remained above the $40-mark.
U.S. West Texas Intermediate felly by 1.57%, to trade at 39.53/barrel, after gaining 4.9% yesterday.
Crude oil prices are expected to recover slowly once economic activities rebound globally.
Tropical Storm Sally picked up its strength in the Gulf of Mexico, west of Florida yesterday.
Brent crude prices dropped 0.51% to trade at $40.58 a barrel, after rising 2.5% on Wednesday.
Both Crude oil benchmarks dropped more than 2% with WTI sliding to its lowest.
OPEC pumped 24.7 million barrels a day for the month of August.
Crude oil markets are still trading unusually been less volatile this week
Also Brent crude soared by 0.4%, to trade at $44.07, heading for a weekly rise around 0.5%.