Sanchez scored 39 La Liga goals during his tenure with the Catalan club and played a part in Barcelona becoming Spanish champions during 2012-13 under Tito Vilanova.
The sale of Sanchez was questioned by some, but Barcelona have shown that it was the right decision as the acquisition of Luis Suarez helped the Blaugrana to a momentous treble last term.
Despite their friendliness ahead of the crunch game in Santiago, Messi will not be as fond of his former team-mate after the result.
The Arsenal attacker scored the decisive spot kick as Chile won their first Copa America crown on penalties after a 0-0 draw.
The result means that Messi has now been on the wrong end of results in international finals on three occasions; in the 2007 Copa America, 2014 World Cup and again this year.