The 28-year-old fired home in the 86th minute to earn Chile a dramatic 2-1 victory over Ecuador in a pivotal game in the race for World Cup qualification.
Victory ensured Chile leapt into third position in the South American qualifying table with one game remaining.
And they can seal their place at next year’s tournament with a win over Brazil, who have already secured qualification, on Tuesday evening.
Sanchez’s future at Arsenal remains unclear after a deadline day transfer to Manchester City collapsed at the 11th hour.
The 28-year-old has nine months left on his current deal and will be free to negotiate with clubs from abroad in January, meaning the Gunners will face the possibility of losing the former Barca man on a free transfer.
Bookies have installed PSG as the favourites for his signature at 2/1, with Manchester City close behind at 9/4.
But Arsenal legend Martin Keown urged the club to keep hold of the prolific forward, claiming the Gunners can not afford to allow both Sanchez and fellow contract rebel Mesut Ozil to leave at the same time.
“The draw at Chelsea demonstrates that there is life after Ozil,” he told the Mail.
“If he is not making himself available for selection, then let him go.
“But losing to Sanchez to City would significantly weaken Arsenal and strengthen a direct rival.
“If it was up to me, I would keep Sanchez until the very last minute of his contract.”
