Jannik Sinner Battles Extreme Conditions Ahead of US Open After Last Year’s Mishap

World No. 1 Jannik Sinner is preparing for the 2026 US Open by training under extreme heat conditions during the North American hard-court swing, aiming to be fully ready for the final Grand Slam of the year. The Italian was previously seen competing at the Mutua Madrid Open on April 26, 2026, where he faced Denmark's Elmer Moller. Sinner's preparations are being closely watched given a heat-related mishap he experienced at the previous year's US Open.