Michigan sophomore Nick Carlson won two matches on the 19th hole Thursday at Oakland Hills to advance to the U.S. Amateur quarterfinals.
Carlson, from Hamilton, Michigan, beat British Amateur champion Scott Gregory of England in the morning round of 32, and topped Thailand's KK Limbhasut in the afternoon round of 16.
Carlson will face Illinois junior Dylan Meyer of Evansville, Indiana, on Saturday on the Donald Ross-designed South Course that Ben Hogan dubbed the "The Monster" in his 1951 U.S. Open victory.
Meyer beat Alex Smalley, the Duke sophomore from Wake Forest, North Carolina, who led stroke-play qualifying, 4 and 3 in the morning and outlasted England's Sam Horsfield in 19 holes in the afternoon.