ATLANTA, GA - SEPTEMBER 23: Dustin Johnson watches his tee shot on the first hole during the second round of the TOUR Championship at East Lake Golf Club on September 23, 2016 in Atlanta, Georgia. Sam Greenwood/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

Dust in front: Dustin Johnson leads Tour Championship as injured Jason Day withdraws

The US Open champion is a shot clear of fellow American Kevin Chappell and on course to land the US PGA Tour’s US$10 million FedEx Cup play-off prize

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ATLANTA, GA - SEPTEMBER 23: Dustin Johnson watches his tee shot on the first hole during the second round of the TOUR Championship at East Lake Golf Club on September 23, 2016 in Atlanta, Georgia. Sam Greenwood/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
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