Argentina's Juan Martín del Potro, the 2009 US Open champion who was the last non-European to win a men's major, "sincerely" believes Frances Tiafoe or Ben Shelton could end the Grand Slam drought for American men.

US Open history was rewritten in the early hours of Wednesday morning when Ben Shelton stunned defending champion Carlos Alcaraz. Shelton defeated Alcaraz 6-7(5), 6-1, 6-3, 1-6, 7-6(10-7) in a five-set marathon that finished at 3:33 a.

Ben Shelton's faces a major career decision after the end of the US Open, where he is currently bidding to become the first American man to win a Grand Slam title in 23 years

Ben Shelton ended Carlos Alcaraz's title reign in the latest-finishing match in US Open history, pulling out a 6-7 (5), 6-1, 6-3, 1-6, 7-6 (10-7) victory in a marathon tussle that ended at 3:33 a.m. ET Wednesday.