Unlike Ozil who lacks strength but possesses technique, Sanchez possesses both. He starts and finishes a game closing down defenders and always looking for that half a yard space to shoot.
In the game against Westham, he took full advantage of the Hammers' shambolic defending to score a hatrick. Although he should be given credit for all three goals especially the second, where he produced a Messsi-esque movement to score. Of all the Arsenal front players who played at the Olympic stadium, only Sanchez looked like a player willing to win.
As an opposition fan, sometimes you wish to have players of other teams play for your team because you think they will do better and even improve your team. Sanchez is a player who will walk into any team and fit in perfectly.