[7] On 22 September, Argentina defeated Samoa with a scoreline of 19–10, with Emiliano Boffelli securing a converted try and 3 penalties, earning him player of the match.
[9] As Pool D began to near its conclusion, Japan faced Samoa on 28 September in a match of high stakes for both sides.
Samoa, who lost Ben Lam to a red card for an upright tackle, were left requiring a victory in their final match against England to have a chance at progression.
The Argentinians raced to a 59–5 victory over the Chileans, scoring eight tries along with strong kicking from Nicolás Sánchez and Santiago Carreras to set up a showdown with Japan on the final matchday to decide who would join England in the quarter-finals.
Despite a valiant effort from the Samoans, who scored two tries through Nigel Ah Wong, England edged the match in an 18–17 victory from a Danny Care try in the 73rd minute to give the English a full house of wins from Pool D as they headed into the quarter-finals while eliminating any hope of Samoa progressing themselves, which place Argentina and Japan in the 2027 Rugby World Cup before the match between two nations.
[11] All that remained in the pool was the final match the following day between Japan and Argentina to decide who would finish second and join England in the knockout stage.