Oh Sammy. So eager to pick a fight and cover up for the failure of your prediction of Spurs' doom. You apparently don't even know what a chart is. Nevermind, I'll show you one:
Each square is a shot taken during the game. The bigger the square, the higher probability that shot had of going in. Essentially, bigger squares are "higher quality" shots. Pink squares are goals.
Notice how small City's squares are. That means the shots are of low quality and unlikely to be scored. Notice how much bigger Spurs' squares are. This means we created better quality shots. And more of those.
Teams losing have a tendency to take more shots than winning teams. The shots also tend to be of lower quality. This is something called score effect, or game state. Basically, as City went behind, they got desperate and took more crap shots in an attempt to score.
Also, they brought on Jesus Navas. A talented player, but historically speaking possibly the worst shooter in Europe. He's one of the few people who consistently underperformed worse than Soldado over the last two years. (One of the others was Coutinho).
So, no luck involved. Our win was actually much better than most journalists will admit.