Iain Carter
BBC golf correspondent at Augusta

Perhaps the biggest roar of the day. a monster birdie putt from Phil Mickelson. A huge, huge roar and that is what this Masters needed. We need the big stars on the leaderboard to get the crowd out there.

There have been less carefully plotted space missions. Phil Mickelson, sends his 40-foot birdie putt at 10, off on a course 10 foot higher than the hole and then watches as it gradually obeys the laws of gravity, homing in before dropping with its last ounce of momentum.

Lefty is now on two over.

Louis Oosthuizen drops his tee-shot within 15 feet on the par-three 16th, but then his ball slopes off like a skulking schoolboy with a free period and a nicotine habit. It is 25 feet or so to the hole by the time the brakes are fully applied.

Defending champion Adam Scott talking to BBC Radio 5 live after shooting a three-under par 69 to be tied second:

"It was a beautiful day out there, I played really well. I enjoyed every minute of it, I had a great time. There are a couple of big days ahead, looks like we have got good weather. I am going to have to sharpen up a little bit on the green,"

Image source, AFP

Caroline Wozniacki bringing a rock edge to Augusta with a shock of pink hair.

Rob Hodgetts
BBC Sport at Augusta National

Bill Haas comes from a pedigree line of Masters competitors so it is perhaps no surprise he is leading at Augusta.

The 31-year-old, the son of former PGA Tour player Jay Haas, shot 68 and leads defending champion Adam Scott by one late on day one.

"My great uncle, my dad's uncle, Bob Goalby, won the Masters in 1968, and I think it's been a special place in our family since then," he said. "Obviously my dad, I think he played I asked him last night, he said he played 22 times here.

"We came most of the years. I remember like it was yesterday, he said it was 20 years ago he finished third and it does not seem that long ago. I remember a lot of the shots he hit coming down the stretch.

"My uncle Jerry, his brother, has competed in a couple Masters; and my uncle Dillard Pruitt, I'm almost positive he played one Masters, maybe two. That's my mom's brother. It's something I think we are very proud of to have that many members of our family be able to tee it up here at Augusta."

-4 Haas (US); -3 Scott (Aus); Oosthuizen (SA); -2 Snedeker (US), -1 McIlroy (NI), Gallacher (Sco).

Selected others: E McDowell (NI), Garcia (Spa) 12; +1 Donaldson (Wal); +2 Clarke (NI) 17; +3 Mickelson (US) 9; +4 Poulter (Eng), Rose (Eng) 9; +5 Donald (Eng) 12.

Image source, AP

Bubba Watson for birdie at 12. Nope, just a little curl short.

Now, Louis Oosthuizen on 15 with something very makable for a birdie. Yep, he has tickled that home and he is up into a share of second place alongside Adam Scott, already in the clubhouse.

Sergio Garcia slips back to level par after coughing up a bogey at 11. He leaves his birdie putt a nudge short at the par-three 12th, just missing out on making immediate amends.

Barry in Much Wenlock: What symmetry. Stadler 3rd and Stadler 3rd last.

Henrik Stenson will need a spare. The Swede flings his ball into the drink at 12 after being tormented by three putts back and forth. He is two over after escaping at the expense of a stroke.

Augusta takes Ernie Els down a peg or two on the ninth, delivering his chip back to his feet off the green.

Lee Westwood winces as his birdie putt eases it way past the trapdoor at nine.

Dustin Johnson putts in for for a birdie off the fringe at 12. Lovely stuff.

Image source, Getty Images

Fi:, external Lee Westwood looks like a lemon meringue pie! #TheMasters

Rob Hodgetts
BBC Sport at Augusta National

Rory McIlroy was satisfied with his day's work after carding a one-under 71 around an Augusta course he called one of the hardest Thursday set-ups he has known.

"It was a good day at the office," he said. "They set the course up very difficult . Some of the pin positions were tough to get close to. For the most part I felt like I put my ball in the positions I wanted to be in.

"The greens are firming up, the wind was all over the place and anything under par today is a good score."

Phil Mickelson punches a lengthy iron off the sheeny pine needles and up onto the green on the ninth.

Sergio Garcia has a tricky putt for par on 11 after leaving it a good 10 feet short with his chip from the outer fringe.

Bubba Watson and Sergio Garcia are sparking off each other in their playing group. The pair of them are lurking dangerously on one under through 10.

Image source, Reuters

Ian Poulter talking to BBC Radio 5 Live after his four-over-par round of 76:

"When I missed greens I hit pretty good recovery shots. I am a little bit frustrated. The course was receptive, It was fairly soft but the greens always run very very fast. The pin locations made it very hard to keep it under the hole and it is very easy to get out of position. You will see guys three-putting.

"The plan tomorrow is play golf and don't make as many mistakes. If I do that I will be fine, I am playing good enough but my scores are not reflecting that. I need to stay focused."

Stephen Gallacher plonks a decent tee-shot onto the green on the par-three 16. Just enough stop on it to hold it up where it needs to be. The Scot is one under.

Louis Oostihuizen is two over through 13 and is one of the few still out there who can rearrange the top of the leaderboard. For the foreseeable anyway.

Rory McIlroy who finished on one under for the day: "I feel ok about today, the set-up today was difficult for a Thursday - some of the pin placements were what you might expect on the weekend. You had to be really patient out there. I feel good and better prepared than I have ever been because experience counts for so much."

Lee Westwood has taken back a stroke with a birdie on six to move him back onto the level-par watershed. He is braced for Amen Corner though.