Sanchez back at flyhalf for Jaguares
The points scoring machine replaces Santiago González Iglesias who wore the No.10 jersey in the loss to the Blues last week.
Sanchez's return flyhalf is one of three changes made by head coach Raul Perez.
Iglesias moves from flyhalf to inside centre, replacing passing Jeronimo de la Fuente.
Matias Orlando will play on the wing moving Emiliano Boffelli to fullback. The shift means Ramiro Moyano, moves to the replacements bench.
In the pack Santiago García Botta replaces Roberto Tejerizo. Tejerizo drops down to the bench. Star forward Juan Manuel Leguizamón returns to the squad and will be among the replacements for the encounter.
Jaguares: 15 Emiliano Boffelli, 14 Matías Orlando, 13 Matías Moroni, 12 Santiago González Iglesias, 11 Manuel Montero, 10 Nicolás Sánchez, 9 Martín Landajo (captain), 8 Leonardo Senatore, 7 Rodrigo Báez, 6 Pablo Matera, 5 Tomás Lavanini, 4 Guido Petti, 3 Ramiro Herrera, 2 Julián Montoya, 1 Santiago García Botta.
Replacements: 16 Facundo Bosch, 17 Roberto Tejerizo, 18 Enrique Pieretto, 19 Juan Cruz Guillemaín, 20 Juan Manuel Leguizamón, 21 Gonzalo Bertranou, 22 Jerónimo de la Fuente, 23 Ramiro Moyano.
Date: Saturday, April 9
Venue: Westpac Stadium, Wellington
Kick-off: 19.35 (04.35 Argentina time; 07.35 GMT)
Referee: Nick Briant (New Zealand)
Assistant referees: Brendon Pickerill (New Zealand), Brett Johnson (New Zealand)
TMO: Ben Skeen (New Zealand)