The 26-year-old arrived at the Emirates Stadium last summer, with the Gunners forking out a reported Â£35million to sign him from Barcelona.
Sanchez has quickly gone about repaying that lofty fee, scoring 16 goals and providing eight more in his first Premier League season.
That success saw him last month make the six-strong shortlist for the PFA Player of the Year award and has now seen him win the PFA's fans' award.
More than 200,000 votes have been cast since the 10-man shortlist was announced at the start of this month, with Sanchez beating Chelsea's Eden Hazard and Manchester City striker Sergio Aguero to the award.
Source : PA