By Evin Priest

Adam Scott admits there will be “plenty of work to do” to make up ground on a red-hot Dustin Johnson on the final day of the BMW Championship, despite carding another solid round at the third event of the FedEx Cup playoffs series in Indiana.

The world No.6 leads the Australian contingent at Crooked Stick Golf Club at 11-under par after 54 holes, but is still seven shots back of the in-form US Open champion.

The 36-year-old Aussie capitalised on his pair of 69s with a 5-under par 67 as Johnson backed up his Friday course-record 63 with a Saturday 68.

American Robert Castro, who shared the 36-hole lead, faded with a 2-over par 74, leaving the long-hitting Johnson to build a three-shot lead over England’s Paul Casey (15-under) going into Sunday’s final round.

Scott admitted to “really struggling” with the putter during the opening two rounds, despite accumulating a 6-under par total. But the Queenslander found form on the greens on Saturday to move into a share of fifth place with Matt Kuchar.

“I was really struggling with the putter (the first two rounds) but I fixed my posture up and hopefully take that into tomorrow,” Scott said after his round.

“I’m hanging in there and a good round tomorrow will go a long way.”

With 3,063 points, the 2013 Masters winner remains in the all-important top-five of the FedEx Cup standings, which would guarantee Scott the FedEx Cup’s $10 million ($AU13 million) bonus prize if he is to win the Tour Championship next week. Jason Day sits second in the rankings with 3,409 points.

World No.1 Day was the next best of the Aussies, and his 1-under par round of 71 saw him settle in a share of 21st. Meanwhile, Aaron Baddeley’s 74 dropped him to an even-par for the tournament and tied for 55th.

Marc Leishman is the only other Australian at the penultimate event – which has no cut – of the FedEx Cup finals and sits near the bottom of the leaderboard in 66th place with a 4-over par total.