Sánchez has 100 caps for Argentina, since his debut on 21 May 2010, in a win over Uruguay, in Santiago, Chile. He has scored 11 tries, 99 conversions, 140 penalties and 12 drop goals, 709 points in total.[2] He is the record highest point scorer for the Pumas.
He participated at the 2011 Rugby World Cup where he played in one match, without scoring.[3] He has been playing at The Rugby Championship, since the admission of the Pumas in 2012, counting currently 16 games, with 10 conversions and 28 penalties scored, 104 points in aggregate, in four presences at the competition.[4]
Sanchez was picked for the Argentina 2015 Rugby World Cup squad. He was the top point scorer in the competition with 97 points and he had the second highest number of penalties scored, finishing with 20. His display of talent in the tournament helped his team to achieve a fourth-place position.[7]
On 8 September 2018, Sanchez overtook the long-serving former Argentinian captain Felipe Contepomi as the highest-scoring Los Pumas player in history. Sanchez scored 14 points against New Zealand on the day, taking his career points tally to 655 points from 68 tests. Sanchez's 14-point haul did not manage to lead Los Pumas to victory, however, as Los Pumas lost to the All Blacks 24-46.[citation needed]
Sánchez was a starter for the Argentina national team on 14 November 2020 in their first ever win against the All Blacks,[8] scoring all 25 of Argentina's points in that test.[citation needed]
