Silhouettes, like that of this line judge, cast a shadow on the US Open courts.Guess who... this athletic pose showcases James Blake hitting a deep overhead in 2007.At 6 feet, 6 inches tall, 2014 US Open champion Marin Cilic casts a towering shadow.France's Gael Monfils had his best US Open result in 2016, when he reached the semifinals.Arthur Ashe Kids' Day means fun in the sun for young tennis fans.Eight-time US Open Quad champ (three singles, five doubles) David Wagner serves it up in 2017.Watch the hair! Caroline Wozniacki's ponytail flies up as she cracks a serve.Johanna Konta's precise contact is mirrored by the shadow of her racquet on the ball.Denis Shapovalov emerges from the shadows for this one-handed backhand during his 2017 third round match against Kyle Edmund.Rafael Nadal, the three-time US Open champion (2010, 2013, 2017), unleashes a lefty serve.Madison Keys, the current world No. 13, reached the 2017 US Open final, where she lost to fellow American Sloane Stephens.A semifinalist in 2017, Venus Williams repeated as women's singles champion in 2000 and 2001.The shadow of Rafael Nadal's 2017 men's singles trophy appears on the court during the post-match ceremony.