South Korea's Gunn Yang leads Canada's Corey Conners 1 up midway through US Amateur final

In this photo released by the USGA, Gunn Yang, of South Korea, watches his tee shot on the 13th hole during the semifinal round of match play at the U.S. Amateur Championship golf tournament at Atlanta Athletic Club in Johns Creek, Ga., Saturday, Aug. 16, 2014. (AP Photo/USGA, Chris Keane) (The Associated Press)

In this photo released by the USGA, Corey Conners, of Canada, watches his tee shot on the first hole during the semifinal round of match play at the U.S. Amateur Championship golf tournament at Atlanta Athletic Club in Johns Creek, Ga., Saturday, Aug. 16, 2014. (AP Photo/USGA, Chris Keane) (The Associated Press)

JOHNS CREEK, Ga. – South Korea's Gunn Yang leads Canada's Corey Conners 1 up in the championship of the U.S. Amateur after the morning round.

Yang led throughout the first 18 holes after Conners bogeyed No. 1 Sunday at Atlanta Athletic Club. The South Korean made it 2 up with a birdie at the 512-yard second hole but couldn't pull away.

Conners finished with some momentum, birdieing the par-5 18th even after his drive wound up some 75 yards behind Gunn's and in a fairway bunker. Conners laid up short of the water and put his third shot about 4 feet away. Gunn reached the green in two but three-putted from 60 feet for par.

After a break, the finalists return for second 18-hole round in the afternoon.