Jannik Sinner and Iga Swiatek have proved they are only human, showing that even the best players in the world have to figure things out on the fly sometimes, as they fought back to claim victories at the US Open.Wimbledon champion Swiatek embodied the day’s theme of triumph through adversity, clawing her way back from 5-1 down in the opening set against Anna Kalinskaya before grinding out a 7-6(2), 6-4 win in their third-round match on Saturday.“I’m happy that I came back and kept … figuring out and problem-solving,” Swiatek said. “For sure, it wasn’t an easy match.”The world number two was far from her sharpest in a scrappy, error-strewn contest – nine breaks and 67 unforced errors by both players combined painted the picture of a match won through sheer bloody-mindedness rather than sublime shot-making.Yet Swiatek steadied herself at the key moments, saving four set points in the first set and breaking late in the second to notch her 20th major match win of the season and draw level with defending champion and world number one Aryna Sabalenka.“It’s not easy sometimes to find the solutions and to find the exact thing that will help you,” she added.“You need to have your mind open enough to think about wha …