Dustin Johnson is "definitely going in the right direction" in his fight for Masters fitness after injuring his back on the eve of the tournament at Augusta.
World number one Johnson was hot favourite to win 2017's first major after a three-tournament winning streak.
However, the U.S. Open champion fell down the stairs of his Augusta rental home on Wednesday to throw his participation into doubt.
In some respects, time is on Johnson's side as he is scheduled to go out with the last group at 14:03 local time, alongside fellow major winners Bubba Watson and Jimmy Walker.
"We got him to the point where he got mobility," Johnson's trainer Joey Diovisalvi was quoted by Golf Digest.
"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 [Wednesday] night.
"He was walking around, a lot more mobility, took a couple of practice swings slowly without a club."
Johnson finished in a tie for fourth at the tournament in Georgia last year.
News of his setback saw the 32-year-old slip behind Jordan Spieth and Rory McIlroy in the bookmakers' odds.