Alexis Sanchez laughs after watching Arsenal team-mate Alexandre Lacazette miss open goal against rivals Chelsea

ALEXIS SANCHEZ could not stop laughing after watching Arsenal team-mate Alexandre Lacazette's unbelievable miss against Chelsea.

The France striker somehow managed to blast over from just five yards out after Aaron Ramsey's first-half shot hit the post.

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."

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.