The Chilean forward is proving to be excellent value for money at £30 million, and with Barcelona only having two players this season who have scored more than two league goals, it's fair to say they may be regretting selling him.
Sanchez is back with his international teammates at present, and has been reflecting on his start at Arsenal.
He has been learning a lot during his start to the season, and has identified a key way he can transform his game to become even more effective.
He told AS Chile: "I could stay a little less with the ball, one touch play more,to facilitate counter-attacks more often.
"That is vital. I must learn that because the rapid transitions are key in this league and with this team."
In the Premier League, Arsenal have scored just the one goal on a fast break this season, and with the pace in the side, they should be looking at making it even more of a strength.
|Touches per game||Key Passes per game||Total Layoffs per game||Accurate Through Balls per game|
Sanchez creates more than two chances per game, but if there is an area to improve, it's his lack of through balls to the striker, making only three in 10 games in total.
This ties in with his own assessment to release the ball earlier and play the ball past defenders who are often scrambling for position.
With Danny Welbeck without a goal in five matches, more clinical passes from Sanchez would also benefit the England international who has shown himself to have the ability to find the net when given the right opportunities, as he was against Galatasaray.