South Africa defeated New Zealand 43-28 to complete a 3-1 series victory in the fourth Test at M&T Bank Stadium in Baltimore. The win secured the series for the Springboks after New Zealand had led the world rankings following the opening match in Johannesburg. New Zealand started fastest, with Codie Taylor scoring early, but South Africa's forward dominance, led by Damian de Allende and Morne van den Berg, established a 17-7 lead by halftime. Will Jordan crossed before the break, but the Boks extended their advantage after the interval through Malcolm Marx and Pieter-Steph du Toit. Late tries from Ethan Blackadder and Beauden Barrett narrowed the gap, but Kurt-Lee Arendse and Cameron Hanekom sealed the result. The match drew a record 68,173 spectators, the largest crowd ever for a rugby match in the USA. The series victory highlights South Africa's consistency and depth as they prepare for the Rugby World Cup next year.

Key performers included Springboks captain Siya Kolisi and fly-half Sacha Feinberg-Mngomezulu, who contributed crucial penalties. For New Zealand, Will Jordan and Codie Taylor were try-scorers, while Richie Mo'unga faced a heavy tackle from Eben Etzebeth. The result maintains the intense rivalry between the two nations, who have dominated the past five Rugby World Cups.