The Chile international was unable to help the north London side claim victory as they slumped to a disappointing defeat against Louis van Gaal’s men and suffered a blow to their Premier League title hopes.
Arsenal do not have long to lick their wounds, as they turn their attentions towards their Premier League clash with Swansea City at Emirates Stadium on Wednesday night.
And Sanchez cheered himself up with his dogs on Monday night as he and his Gunners team-mates prepare to face the Swans.
Sanchez posted the picture above on his personal Instagram account and wrote: “Buenas noches, good night”
Arsenal head into Wednesday’s game with Swansea in third place in the Premier League table and five points behind leaders Leicester.
The Gunners take on Tottenham Hotspur at White Hart Lane on Saturday lunchtime.
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