Tiger Woods carded an impressive six-under 66 to take a share of the lead after the first round of the WGC-Cadillac Championship on Thursday, while John Senden and Geoff Ogilvy are three shots off the pace. The world number two made a promising start in benevolent conditions at the TPC Blue Monster in Miami, shooting nine birdies and three bogeys to head a group of five players at six under. “The wind was up but not like it normally is here,” Woods said. “It&aposs probably the easier wind. We played some of the par-fives downwind so that makes a big difference. “I don&apost think we are going to get all four days like this. Today was as easy as it gets around this place.” Northern Irishman Graeme McDowell, Spaniard Sergio Garcia, Swede Fredrik Jacobson and American Bubba Watson joined Woods at the top of the leaderboard. McDowell and Garcia recorded bogey-free rounds, while Jacobson made two eagles, three birdies and a bogey. Another Swede, Peter Hanson, was tied for sixth alongside Americans Hunter Mahan, Phil Mickelson and Steve Stricker at five under. Mahan was six under through 15 holes before closing with two bogeys and a birdie. Englishmen Ian Poulter and Justin Rose and America&aposs Keegan Bradley, Bo Van Pelt, Dustin Johnson and Charles Howell III are a further shot behind in equal 10th. John Senden and Geoff Ogilvy were the best of the Australians in a tie for 16th at three under, while Adam Scott shot an even-par 72. Marcus Fraser and Jason Day will need to improve in their second rounds after shooting 73 and 74 respectively. World number one Rory McIlroy, who last week infamously withdrew from the Honda Classic, continued to struggle, posting six bogeys on his way to a one-over 73. Luke Donald, ranked third in the world, recovered from a double bogey with a run of birdies to finish at two under.