Dustin Johnson might not be able to play the Masters 2017 after injuring his back
Johnson, the world number one, fell down the stairs of his Augusta rental home at 3pm ET (8pm BST) yesterday afternoon.
His manager David Winkle released a statement saying: “Dustin took a serious fall on a staircase in his Augusta rental home.
“He landed very hard on his lower back and is now resting, although quite uncomfortably.
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“He has been advised to remain immobile and begin a regimen of anti-inflammatory medication and icing, with the hope of being able to play tomorrow.”
Winkle has said that he will not comment until more is known about Johnson’s condition.
Johnson is in the last group in the opening round and is due to tee off at 2.03pm ET (7.02pm BST) today with Bubba Watson and Jimmy Walker.
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He had been the frontrunner to win the Masters, but his odds have now drifted to 8/1 according to Betfair, putting him in second place behind Rory McIlroy and Jordan Speith, both at 7/1.
But if Johnson is unable to play, will punters get their bet back?
Most bookmakers will refund customers if Johnson pulls out of the tournament, but customers will need to check with individual companies.
Johnson's partner Paulina Gretzky and son Tatum Gretzky Johnson have been cheering him on
Johnson is currently world number one
A Betfair spokesperson told Express.co.uk: “If Dustin Johnson doesn’t strike a ball in the tournament then we will refund customers, but if he does play but pulls out during the tournament then those bets would stand.”
Betfair has rated Johnson 2/9 to play today.
Betfred told Express.co.uk: “If Johnson doesn’t line up he classes as a non-runner, and bets will be refunded”.