Spain’s Rafael Nadal will begin his tune-up for the US Open in August-September with the Citi Open—an ATP 500 hard-court tournament—which commences here on Monday.

After having skipped Wimbledon and the Tokyo Olympics the World No. 3 begins his quest for an 89th tour-level title as the top seed and he could meet one of the most in-form players of the season in an early test.