Southfield -- Austin Jenner of West Branch sprang a big upset for the second straight day in the Michigan Amateur at Plum Hollow Country Club.
Jenner, 17, eliminated defending champion Henry Do of Canton 2-up on Thursday and earned a spot in Friday's semifinals. On Wednesday, Jenner defeated medalist Reed Hrynewich of Muskegon.
Jenner will face Ryan Johnson of New Boston, who beat Tom Werkmeister of Kentwood 3 and 1.
In the other semifinals, Bert Quitiquit will meet Kory Roberts. Quitiquit of Highland ousted Otto Black of Pinckney 2 and 1, and Roberts of Battle Creek beat Steve McKalko of Troy 1-up.
Friday's semifinal winners will then face off for the title.
The complete match play bracket can be found at the Golf Association of Michigan website.
Round of 16
Jenner d. Pahl, 5 and 3
Do d. Varekois, 2 and 1
Werkmeister d. White, 6 and 5
Johnson d. Gaines, 4 and 3
Black d. Ruffino, 19 holes
Quitiquit d. Green, 19 holes
McKalko d. Polulak, 6 and 5
Roberts d. Rodes, 4 and 3.
Round of 8
Jenner d. Do, 1-up
Johnson d. Werkmeister, 3 and 1
Quitiquit d. Black, 2 and 1
Roberts d. McKalko, 1-up