A major championship is a lot like a horse race.
The best jockeys and horses don't win a race in the first quarter mile. They are merely trying to position themselves for a great run down the stretch. Zach Johnson has positioned himself at the front of the pack after one round of The Open Championship, and he's hoping he has plenty of gas in the tank.
Muirfield proved to be quite challenging in the opening round. It's likely to become even more of a test if the winds pick up in the second round.
Here's a look at the biggest questions entering Day 2.