2014 US Open Game 7
Here I am going into the 7th round of the 9 round tournament with 2.5 points. Surprisingly I've been significantly paired up in every round except the second and I was getting pretty comfortable playing against 1700-2000 level players, which was one of the primary goals of playing in this tournament.
It turns out that in this game, I was behind after some botched trades in the middlegame but during the game felt I was slightly better. It shows that I have some work to do on my evaluation skills.