It was yet another tough evening for Alexis Sanchez at Manchester United on Monday.The Chilean forward has looked a pale shadow of the player he was at Arsenal after his January move, with Tottenham easily nullifying him after he came off the bench.Jose Mourinho brought Sanchez on when his side were 2-0 down and he did little to scare Spurs' defence - they eventually lost 3-0.He's only managed three goals in 2018 and it seems his positive pre-season was all in vain.His move to United in January was one of the most controversial in Premier League history, with Henrikh Mkhitaryan heading in the other direction.While the Armenian hasn't exactly hit the ground running in north London, Gunners fans are not sorry to see the back of Sanchez.And fans will absolutely love what Alexandre Lacazette has done on Twitter after Sanchez's performance against Spurs.User @AleeArsenal uploaded a photo mocking Sanchez which quickly went viral, amassing 10,000 retweets and 18,000 likes at the time of writing.But who decided to like it? Only Lacazette himself and you can see the evidence from the screenshot below.That's one way to make yourself even popular with Arsenal fans and they showed their appreciation towards the Frenchman.

ARSENAL FANS REACT

Lacazette and Sanchez had a short time playing together at the start of last season and there was genuine hope that the Gunners would have one of the most feared attacks in Europe.

It didn't really work out on the pitch and in the end, Sanchez opted out.

Back in October, Lacazette stated that the Chilean was one of the big reasons why he decided to swap Lyon for Arsenal.

He told Arsenal’s website: “That’s also one of the reasons why I wanted to come to Arsenal - to play with players of [Sanchez’s] calibre.

“Just seeing him in training, I like the way he plays and his mental attitude. His approach makes me want to play alongside him - hopefully for many years.”

How times change.