Jason Day forced to withdraw as Dustin Johnson stays on course for FedEx Cup

Johnson remains on course for the FedEx Cup title and 11.5million US dollar payday.

Dustin Johnson remained on course for the FedEx Cup title and 11.5million US dollar payday as world number one Jason Day was forced to withdraw from the Tour Championship.

Day pulled out of the BMW Championship after eight holes of the final round a fortnight ago and lasted only eight holes of his second round in Atlanta before calling it a day with an ongoing back injury.