Zach Johnson shot a five under par 67 to lead the Northwestern World Challenge at Thousand Oaks in Los Angeles.

Fellow American Matt Kuchar continued his good end-0f-season form with a 68 however a number of big stars, including tournament host Tiger Woods, struggled.

Woods bogeyed the 1st hole before just two birdies at the 5th and 11th holes on route to a 71.

Rory McIlroy carded a one over par 73 that included three birdies but also four bogeys and less than a week after his stunning Australian Open success.

Australia’s Jason Day, who captured ‘Individual’ honours at the recent World Cup of Golf, carded a 76 to be tied in second last place in the 18-player field with England’s Ian Poulter.

And in last spot and shooting a 77 was PGA Tour Rookie of the Year Jordan Speith.

Tiger Woods day one 2013 World Challenge. (Photo – www.pgatour.com)