Former Arsenal player has admitted that he is “psychologically and emotionally exhausted” since joining Manchester United.
The misfiring Chilean posted a picture to Instagram of himself training with the national team, captioned: "I know you are psychologically and emotionally exhausted.
"BUT YOU HAVE TO SMILE AND CONTINUE."
Speaking ahead of Saturday's friendly in Sweden, Sanchez said: "After my arrival at United, it was hard to change everything very quickly. I even hesitated to come here [to Sweden, with the national team].
"I had asked permission to miss these games, but then I thought better and spoke with Claudio [Bravo] and told him that we should all be united,” Sanchez added.