Tough night for Anna Kalinskaya fans. She stormed out to a 5-1 lead against World No.1 Iga Swiatek, but couldn't close out the set—losing four set points before Swiatek turned the tide and took it 7-6. From there, the Polish ace was unstoppable. Kalinskaya was seen in tears in the tunnel after the match, showing just how much this one stung. Did nerves get the best of her, or is Swiatek just too clutch under pressure? #Sports #Tennis #USOpen