SYDNEY — Cameron Davis came from six shots behind going into the final round to win the Australian Open by one stroke on Sunday, shooting a 7-under 64 that included a birdie on the 18th and an eagle after holing a 100-meter approach shot.

The 22-year-old Australian finished with an 11-under total of 273 at The Australian Golf Club, where gusty and unpredictable afternoon winds made scoring tough for all four rounds.

“I didn’t know where I was, to be honest, after the third round,” Davis said of his six-stroke deficit. “I’m just glad I did enough today to get the job done.”

Sweden’s Jonas Blixt, who missed a 12-foot birdie putt on the 18th that would have forced a playoff, shot 68 to finish tied for second with Matt Jones (68) while third-round leader Jason Day was fifth after a 73, three strokes behind.