I asked my swing coach what to do. She said, "Forget about her game. Just think fairways and greens, fairways and greens." That's exactly what I did. I played even with her on the first three holes, but she had to give me one stroke on each of them, so I won the first three.
For the next 12 holes, she couldn't hit the ball. The mental game of golf is so much more difficult than hitting the ball, isn't it?
If you have a higher handicap you think about being embarassed by the better players, and with a low handicap, you are fine, unless you fall apart, which is what she did.
With three holes left, she had to win all of them to tie. She won one, we tied one, and she lost one. So I moved to the next round, a very happy winner.
I maintained my game plan, "Fairways and greens" but after about the 12th hole, my cart partner, who was not in the tournament, starting focusing on the fact that I had almost won without finishing. That took away some of my concentration, but it all worked out!