Dustin Johnson was an injury concern ahead of the Masters
Johnson had been the favourite to take his first Masters title until he fell down a set of stairs in his Augusta rental home and injured his back last night.
However, the world no 1's trainer Joey Diovisalvi today revealed Johnson was already moving around reasonably well.
"We got him to the point where he got mobility," said Diovisalvi.
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"He was up and moving around and definitely going in the right direction.
"He was very much in an under control point going to bed last night.
"He was walking around, a lot more mobility, took a couple of practice swings slowly without a club."
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Dustin Johnson is the reigning US Open champion
Johnson is due to tee off at 7.03pm UK time in a blockbuster final group of the day alongside fellow Americans Bubba Watson and Jimmy Walker.
He will do so having drifted to 9/1 to win the Masters with Jordan Spieth and Rory McIlroy installed as joint-favourites.
But Dr Ara Suppiah, PGA Tour Golf doctor, believes the medical team are likely to have prevented Johnson sustaining any long-term damage or hindrance to his game.
“The main goal was to control the pain overnight to minimise stiffness and avoid spasms this morning,” Suppiah said.
“The team acted very quickly, which makes a huge difference in getting control of the situation and prognosis.”