( CNN ) -- Chinese amateur Guan Tianlang plays back nine of Augusta with Tiger Woods . Hide Caption 7 of 11 Photos: 2011 British Open champion Darren Clarke forced to withdraw due to a hamstring injury . Jose Maria Olazabal apologizes to fan after hitting him in the head with a wayward shot .
Chinese amateur Guan Tianlang plays back nine of Augusta with Tiger Woods . Hide Caption 7 of 11 Photos: 2011 British Open champion Darren Clarke forced to withdraw due to a hamstring injury . Jose Maria Olazabal apologizes to fan after hitting him in the head with a wayward shot .