By 21 August, he retook the ATP No. 1 ranking from Andy Murray. Nadal earned his third US Open title against first-time Grand Slam finalist Kevin Anderson, winning the final in straight sets. This marked the first time that Nadal had captured two
Grand Slam tournaments in a year since 2013, and the second time since 2010. Nadal extended his winning streak by winning the China Open, winning the final against Nick Kyrgios in straight sets. On 11 September 2017, Nadal and Garbiñe Muguruza made Spain the first country since the United States 14 years ago to simultaneously top both the ATP and the WTA rankings, with Muguruza making her debut in the No. 1 spot.