Arsenal and Manchester United clashed on Saturday in a fiery match between historic rivals at the Emirates.
The hosts dominated the Premier League contest for long spells before falling behind to a Kieran Gibbs own goal in the 56th minute. Shortly after, a second from Wayne Rooney secured the points, while Angel Di Maria should have added a third on the counter.
Olivier Giroud netted what proved to be a consolation goal midway through nine minutes of injury time as Arsene Wenger's side battled in vain to stop the Red Devils claiming a first away victory of the season.
The Gunners have proven overly-reliant on one man so far this season, but against the Red Devils he was unable to make the desired impact. Sanchez has been in impressive form since his summer arrival, and to put his importance into perspective, he has directly contributed (either scored of assisted) in 50% of his club's total Premier League goals this term.
He created chances against United, fashioning a match-best seven key passes and 14 crosses, but this had little impact on the final scoreline. His attacking team-mates squandered various opportunities in the first period, and following United's snatch-and-grab second half opener, morale reached an all-time low.
David de Gea's inspired goalkeeping performance proved mostly responsible for the Gunner's misfortunes. Nonetheless the team's finishing been more accurate, the result could have been very different. Sanchez managed four attempts himself, from which he hit the target just twice.
His usual, hard-working self, the Chilean battled until the dying moments of the match. He recorded more touches than any other player, while completing two dribbles and two fouls. He may have been successful in just 71% of his passes, yet 27 of his 41 attempts to find a team-mate came in the final third.
As is always the case, he contributed in a defensive capacity for his side, making three tackles. He has become a fan favourite for his never-say-die work ethic, and despite being dispossessed on seven occasions he continued to track back and battle in order to recover possession.
It was another disappointing result for a player who's performance deserved far better.