Dustin Johnson handles wind and wait and leads British Open by 1 stroke; Spieth 5 shots back

United States’ Jordan Spieth, right, shakes hands with United States’ Dustin Johnson after finishing their round on the 18th green during the second round of the British Open Golf Championship at the Old Course, St. Andrews, Scotland, Saturday, July 18, 2015. (AP Photo/David J. Phillip) (The Associated Press)

United States’ Dustin Johnson drives a ball from the 18th tee during the second round of the British Open Golf Championship at the Old Course, St. Andrews, Scotland, Saturday, July 18, 2015. (AP Photo/David J. Phillip) (The Associated Press)

Dustin Johnson survived the longest round and 40 mph gusts with one last birdie for a 3-under 69 and a one-shot lead in the British Open.

The morning wind was so strong it blew golf balls on the green and led to a delay of nearly 10 hours. It forced the first Monday finish in the British Open in 27 years.

Johnson, coming off a crushing loss at the U.S. Open, was at 10-under 134.

Danny Willett got the day off and was one shot behind. He finished his 69 on Friday. Paul Lawrie played bogey-free on the inward nine and shot 70 to finish two shots back.

Jordan Spieth, going for the third leg of the Grand Slam, three-putted five times and managed a 72. He was five behind.