It's win or go home.
Their highly anticipated duel will be one of three matches between unbeatens; Rory McIlroy and Kevin Na will also square off in a battle of 2-0 records, as will Louis Oosthuizen and Andy Sullivan. The winner of the Matt Kuchar-Justin Rose match – they are both 1-0-1 – will reach the Round of 16.
There is a possibility that three groups could end in a four-way tie: Groups 4, 5 and 8. In that case, a sudden-death, stroke-play playoff would begin off No. 1 on Friday afternoon.