Koepka on top at season-ending Tour Championship

KEVIN C. COX / GETTY IMAGES NORTH AMERICA / AFP

Brooks Koepka is on top of the leaderboard at the halfway stage of the Tour Championship.

The world number one is a shot clear of two-time Omega Dubai Desert Classic winner Rory McIlroy and Justin Thomas.

Meanwhile Xander Schauffele trails Koepka by two strokes in what is the PGA Tour's season-ending tournament.

The third round from East Lake Golf Course gets underway later on Saturday.

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