The Aberdeen 22-year-old, who is 41^st on the amateur rankings, was three holes down against the American with three holes to play at Riviera Country Club in Los Angeles.

Perry won the 16^th and 17^th before both players parred the last.

The British Amateur runner-up was the leading Australian after the stroke-play qualifying rounds and won his first match-play contest against American Alex Smalley on the 19^th hole.

He and Morikawa were all square after eight holes on Friday, but bogeys at 9, 12, 14 and 15 brought him undone.