The points are shared after a 1-1 draw between Argentina and Chile. Both goals came in the first half, with Messi putting Argentina ahead from the penalty spot after VAR awarded it for a clumsy challenge on Lautaro Martinez.
Sanchez then equalised with a tap-in into an empty net from a free-kick.
Messi had two good chances from free-kicks himself, seeing the first pushed away by Bravo before hitting the second one against the bar.
The draw means Argentina are unbeaten at home against Chile in 35 matches, and have gone 12 games without defeat since losing to Brazil in the 2019 Copa America semi-finals.
‘The positive aspect is that this team always stands up to be counted, tries to attack,’ Argentina coach Lionel Scaloni. ‘They (Chile) practically never created any chances.’
Argentina are second in the 10-team South America qualifying group for Qatar 2022 with 11 points from five games, a point behind Brazil, who play Ecuador on Friday.
Chile are sixth, with five points from five games.
The top four teams qualify automatically for Qatar while the fifth-placed side goes into an intercontinental play-off.
Next up for them is Colombia before the start of the Copa America. As for Chile, their poor start to the campaign goes on and they stay in sixth place.
They face Bolivia in their next game.