Rory McIlroy says he's not driven by the financial incentive of winning the PGA Tour play-offs.
He's three shots off the leaders after the first round of the final event in Atlanta, after finishing his opening day 1-under par.
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Victory would earn the world number one prize money of over $10-million.
Americans Chris Kirk and Billy Horschel are the early pacesetters on 4-under.
