US Masters runner-up Jordan Spieth upstaged tournament drawcards Rory McIlroy and Adam Scott to grab a one-shot lead after the opening round of the Australian Open in Sydney on Thursday. The 21-year-old American holed six birdies and two bogeys in a four-under 67 to lead Australians Aron Price and Scott Gardiner. Spieth stole the opening round headlines from world number one McIlroy and third-ranked Scott in tricky conditions at the Jack Nicklaus-designed The Australian course.