It was a stunning goal from the Chilean on the edge of the box.
But Arenal fans were not happy Fernandez was allowed time to control and shoot in off the post.
And their ire was directed specifically at Shkodran Mustafi.
One fan tweeted: “Deserved goal for Al-Nasr! Very sloppy start from Arsenal”
Arsenal conceded a stunning goal to Al Nasr in the friendly today (Image: AFC)
The attack started on Al Nasr's right wing (Image: AFC)
Fernandez was unmarked on the edge of the area (Image: AFC)
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Fernandez was allowed time and space to set up his shot (Image: AFC)
Three Arsenal defenders could not block the shot (Image: AFC)
Arsenal were caught on the counter attack against Al Nasr (Image: AFC)
Arsenal's defenders looks all at sea (Image: AFC)
Fernandez's shot bypassed three Arsenal defenders (Image: AFC)
Another said: “Arsenal are playing against a team from Dubai and still Mustafi is at fault for the goal? How’s he still playing”
A third said: “It's International break yet we're still conceding goals. Only Arsenal.”
And a fourth sarcastically tweeted: “Mustafi with some world class defending there on the al Nasr goal.”
Al Nasr took the lead with this magnificent effort (Image: AFC)
Fernandez goes for goal (Image: AFC)
Bernd Leno could not reach the shot (Image: AFC)
Al Nasr celebrate their goal (Image: AFC)
Nigel Winterburn was commentating on the game for Arsenal TV and said: “No goalkeeper in the world is going to save that.
“First it was a fantastic touch.
“And second to curl it in off the post.”
Arsenal did eventually get level in the friendly when Carl Jenkinson scrambled home a rebound after hitting the post.
And they went in front after the break when Lacazette took the ball off Ozil and clipped home from the edge of the box.