Augusta - Jordan Spieth was charging ahead on the second day of the Masters on Friday with a birdie at the first hole.
The 22-year-old defending champion started the day with a two-shot lead after an opening 66 and none of his rivals was able to close the gap in the morning's play.
Spieth then sunk a 14-footer to get to 7-under and narrowly missed a seven-footer to pick up another shot at the second.
At that stage, the American led by three strokes from playing partner Paul Casey of England, who grabbed a birdie at the second.
New Zealander Danny Lee was on 3-under after 14 holes, one back from where he started, still level with Ireland's Shane Lowry, who had reached the turn.
World number one Jason Day was fighting hard to close the gap on Spieth, but he went into the water on the par-5 13th and fell back to level par, seven shots off the lead.
Grand slam seeker Rory McIlroy had a double-bogey at the fourth and was 1-under at the turn.