PORTRUSH, Northern Ireland — The rain pounded Royal Portrush right when Scottie Scheffler poured in a birdie putt on his first hole Friday in the British Open. No matter. Nothing stopped the world’s No. 1 player on his way to a 7-under 64 to build a one-shot lead going into the weekend.

Scottie Scheffler made eight birdies on another wild afternoon of weather at Royal Portrush, and the result was a one-shot lead over Matt Fitzpatrick.