Nick O&aposHern has sizzled in his partway-finished opening round at the FBR Open to lead the Australian assault at Scottsdale. After a 40-minute frost delay caused chaos at the $6.7 million event, O&aposHern managed to get through 14 holes in five-under-par. He trails clubhouse leaders Evin Sutherland and Charles Warren after the American pair notched rounds of six-under-par 65 to be locked atop the leaderboard. O&aposHern will get the chance to join them – or perhaps head them after one round – when he completes his opening round before starting his second. Equal with O&aposHern after completing their first rounds are Rich Beem, Brian Gay and Camilo Villegas. A host of players turned in 67s on day one of the famous event, including Charloes Howell III, Brandt Snedeker and Kenny Perry. O&aposHern&aposs countryman John Senden is tied for 14th after he fired three-under-par, along with Phil Mickleson and Rory Sabbatini. Robert Allenby is three-under-par through 15 holes. A shot off that group sits a large contingent of players who enjoyed solid starts and signed for two-under-par rounds to kick off the week. Aussies Steve Elkington, Stephen Leaney and Stuart Appleby completed 18 holes and all carded rounds of 69. A total of 24 were still on the course when play was suspended because of darkness Almost 90,000 people braved the conditions to watch the opening day&aposs play. Officials expect numbers to swell, peaking on Saturday when more than 150,000 fans are tipped to watch the players bustle for position ahead of the final round.