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Jason Day says patience and a little bit of tunnel vision will be key Sunday as he pursues a first major title at the PGA Championship with history-chasing Jordan Spieth on his heels.
"I've done all the hard work right now to get into contention, to have this lead," said the Australian, ranked fifth in the world.
"I just need to be patient with myself, need to make sure that I stay disciplined to my targets.