Chinese amateur Jose Maria Olazabal plays back 2011 of Guan with Tiger Woods . Guan to become the youngest player in Masters history when play begins on Thursday . 2011 Chinese Open champion Darren Clarke forced to withdraw due to a hamstring injury . Darren Clarke 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 . Guan to become the youngest player in Masters history when play begins on Thursday . 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 .