On 14 November 2020, in Argentina's first victory over New Zealand, Sánchez scored all twenty-five of Argentina's points scored (25–15) in the 2020 Tri Nations Series at Western Sydney Stadium, Sydney. He became the third highest-scoring player against New Zealand in a single-match, behind Morné Steyn's 31 points in 2009 and Christophe Lamaison's 28 points in the 1999 Rugby World Cup.