Rory McIlroy showed great fighting spirit to battle through a worrying back injury that threatened to end his hopes of defending his FedEx Cup title, saying he was "over the moon" to just be three shots off the lead after the first round of the Tour Championship.
McIlroy said he couldn't event address the ball on Wednesday due to a back spasm, and was in visible discomfort as he tried to go through his pre-round warm-up at East Lake on Thursday.
