![American Jack Sock the latest victim of the heat at U.S. Open, retires in 4th set - New York Daily News American Jack Sock the latest victim of the heat at U.S. Open, retires in 4th set - New York Daily News](https://www.nydailynews.com/resizer/6VdOxS42I6bXeEq7mKKuztaDlsw=/1200x0/top/arc-anglerfish-arc2-prod-tronc.s3.amazonaws.com/public/ZRAKQ5XFPITZ3BJU4LJV26PEJU.jpg)
American Jack Sock the latest victim of the heat at U.S. Open, retires in 4th set - New York Daily News
![Jack Sock on Twitter: "Good practice this morning with @TommyHaas13 here in LA http://t.co/wjtmiA1B" / Twitter Jack Sock on Twitter: "Good practice this morning with @TommyHaas13 here in LA http://t.co/wjtmiA1B" / Twitter](https://pbs.twimg.com/media/A3Q0YogCEAA9tji.jpg)
Jack Sock on Twitter: "Good practice this morning with @TommyHaas13 here in LA http://t.co/wjtmiA1B" / Twitter
![Historical perspective of the key aspects making Jack Sock's forehand to one of the tour's best, but also rather vulnerable Historical perspective of the key aspects making Jack Sock's forehand to one of the tour's best, but also rather vulnerable](http://cpta-tennis.org/wp-content/uploads/2017/03/DSC_0395.jpg)
Historical perspective of the key aspects making Jack Sock's forehand to one of the tour's best, but also rather vulnerable
![Photos: Alex Zverev vs Jack Sock at the 2021 US Open - Official Site of the 2021 US Open Tennis Championships - A USTA Event Photos: Alex Zverev vs Jack Sock at the 2021 US Open - Official Site of the 2021 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_20210904_USO_Day6_PS6_1118.jpg)
Photos: Alex Zverev vs Jack Sock at the 2021 US Open - Official Site of the 2021 US Open Tennis Championships - A USTA Event
![Tennis Inside Out on Twitter: "A little shirtless Jack Sock for you... http://t.co/TtAhVmCB1O" / Twitter Tennis Inside Out on Twitter: "A little shirtless Jack Sock for you... http://t.co/TtAhVmCB1O" / Twitter](https://pbs.twimg.com/media/BvGXkA0CIAA6VUS.jpg)
Tennis Inside Out on Twitter: "A little shirtless Jack Sock for you... http://t.co/TtAhVmCB1O" / Twitter
![American Jack Sock the latest victim of the heat at U.S. Open, retires in 4th set - New York Daily News American Jack Sock the latest victim of the heat at U.S. Open, retires in 4th set - New York Daily News](https://www.nydailynews.com/resizer/MKL0cajoI1PchmmwW-uV2Nuecys=/800x987/top/arc-anglerfish-arc2-prod-tronc.s3.amazonaws.com/public/W2E6THDB4O3BBHDOGTHSQTBRIM.jpg)