Gunners striker dropped to the bench was savaged by fans after cameras picked him up in hysterics at France forward’s howler
The France striker somehow managed to blast over from just five yards out after Aaron Ramsey’s first-half shot hit the post.
Alexis Sanchez laughs from the bench after Alexandre Lacazette misses chance at Chelsea
Alexis Sanchez laughs on the sidelines following Alexandre Lacazette’s miss
Alex Sanchez grabs hold of David Ospina
And the Sky Sports cameras panned to the Gunners bench to show the Chile frontman in hysterics.
Sanchez hugged a disconsolate David Ospina, who looked equally in disbelief at Lacazette’s howler.
Some Gunners fans were fuming at Sanchez – who was on the brink of joining Manchester City in the summer – for his reaction.
One wrote: “Alexis Sanchez laughing at Lacazette missing… Get this man out of Arsenal.”
Another said: “Alexis Sanchez stop laughing when we don’t score you f*****g c***.”
A fellow Twitter user posted: “Nice to see @Alexis_Sanchez laughing at @LacazetteAlex missing – hurry up and leave please.”
The Chile frontman was rounded on by some fans who questioned his actions
Alexis Sanchez could barely contain his laughter following his team-mate’s miss
Alexandre Lacazette somehow managed to miss from just a few yards out
Alexis Sanchez sits behind Arsene Wenger at Stamford Bridge
Alexis Sanchez replaces Alexandre Lacazette
Chelsea’s David Luiz gets sent off for a high late challenge on Arsenal’s Kolasinac
One said: “Not sure why @Alexis_Sanchez is laughing at @LacazetteAlex miss. I’ll take someone who wants to play at club over someone [who] doesn’t #Arsenal.”
Another posted: “I am glad @Alexis_Sanchez isn’t playing. I would send him to hell. Laughing after missing a chance. He doesn’t give a s**t about the club.”
Sanchez went on to replace Lacazette in the 66th minute and patted his team-mate on the back as he took to the pitch.
It was back in March that Sanchez appeared to laugh during Arsenal’s 10-2 drubbing by Bayern Munich.
Chelsea 0-0 Arsenal: David Luiz sent off as Gunners prove their mettle at Stamford Bridge to earn a point after Alexis Sanchez was dropped
Goals of the Weekend: Watch the best strikes from this week’s Premier League action