Catriona Matthew of Scotland plays her tee shot at the par 5, 5th hole during the first round of the 2015 KPMG Women's PGA Championship on the West Course at Westchester Country Club on June 11, 2015 in Harrison, New York
The 46-year-old Matthew, who won the event 20 years ago, peeled off a three-under 69 to join Clyburn at eight-under 136 after 36 holes.
Jack Nicklaus, who won the Augusta Masters in 1986 at the same age, gave his support for Matthew in her quest for a second Australian Open title.