The 14-time Grand Slam-winning doubles partners lost in the tournament’s opening round on Monday

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Venus and Serena Williams lost their first doubles match in four years on Monday

The sisters lost to Marta Kostyuk and Peyton Stearns, 6-2, 1-6, 1-0 (8) in the first round of the Cincinnati Open

Serena has not said whether she will play in the US Open later this month

Serena and Venus Williams’ doubles comeback came to a halt in the first round of the Cincinnati Open.

The 14-time Grand Slam-winning doubles partners lost their first match together in nearly four years to Marta Kostyuk and Peyton Stearns, 6-2, 1-6, 1-0 (8) on Monday, Aug. 17.

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