If you currently don’t use a preview stroke try it — and give it a least a month. Always make your preview strokes while focusing on your aim line and visualizing the putt’s roll from start to finish.
The shot from the fairway stopped short of the first even though it landed in the same spot. That’s because you generated much more backspin due to the cleaner lie. And for the teed-up third ball which had zero grass on the clubface to interfere with contact you created max backspin and stopped the ball almost immediately after it hit the green.
Of course a lot of players will successfully avoid the trouble and land their tee shots on the green. Even in this scenario No. 7 can still derail a player’s hopes of winning the championship. In fact you can stick it to four feet and still have problems.