But the Chile international has struggled to replicate his goalscoring exploits in this campaign.
"When I don't score goals I feel like I've failed the team and I feel guilty. I go home, can't sleep and I just think I have to play better," Sanchez told the club's website (www.arsenal.com).
"I think that I've adapted really well in terms of fitting into the club and it's been very good. But at the same time I'm not the kind of person to become complacent or think, 'That's it',"
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Arsene Wenger's men will continue their bid for a first FA Cup hat-trick since Blackburn Rovers in the 1880s when they host Watford in the quarter-finals of the FA Cup on Sunday.
(Reporting by Shravanth Vijayakumar in Bengaluru; Editing by Jon Boyle)
