Marta Kostyuk Enjoys Bikini Fun Before US Open Showdown

Ukrainian tennis star Marta Kostyuk is living it up in her black bikini before diving back into the tennis world. After an amazing season, including a thrilling Wimbledon semi-final, she's ready to trade sunbathing for hardcourt battles. With a playful selfie saying, "One last day before trading bikinis for hard courts," she's all set to chase that elusive Grand Slam at the US Open!