Dustin Johnson was on the range hitting wedge shots at Augusta
Johnson, who was the favourite to win his second major title at Augusta National, suffered a "serious fall" yesterday after the cancellation of the traditional par-three contest due to bad weather.
"At roughly 3pm, Dustin took a serious fall on a staircase in his Augusta rental home," his agent David Winkle said in a statement.
"He landed very hard on his lower back and is now resting, although quite uncomfortably. 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."
But it looks Johnson has recovered enough to tee off at 7.03pm.
He was going through his shots on the driving range this afternoon.
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Johnson, who missed the 2012 Masters after reportedly injuring his back when lifting a jet-ski, at least had the advantage of being in the final group out on today.
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The 32-year-old won the Genesis Open in February to reach world number one and then added victories in the WGC-Mexico Championship and WGC-Dell Technologies Match Play.
He has also finished sixth and fourth in his last two Masters appearances, but was coincidentally taking nothing for granted in his pre-tournament press conference on Tuesday.
"I mean, golf, it's a funny game," the US Open champion said. "It doesn't matter how good you're playing, you can still not win. Same goes for this week.
"If I want to win here, everything's going to have to go well for me. I'm going to have to drive it well, hit my irons well, putt it well.
"I've got a lot of confidence in my game right now, especially with the way I've been playing the last few tournaments. But, you know, anything can happen."