Rory McIlroy chasing career Grand Slam at Augusta
McIlroy opens with one-under-par 71
Jordan Spieth leads by three on -8
England's Justin Rose tied second on -5
Defending champion Bubba Watson finishes -1
Sergio Garcia -4; Paul Casey -3; Tiger Woods +1
Garcia into the 15th... he's overcooked that by miles, bit of adrenalin kicking in down the stretch. The 18th is the hardest hole on the course today, playing 4.51. McDowell edges that average a little bit higher with a bogey, the Northern Irishman is in with a 71.
-7 Spieth (US) after 17 -5 Hoffman (US), Rose (Eng), Els (SA) -4 Henley (US), Day (Aus) 14, Garcia (Spa) 14 -3 Haas (US), Simpson (US), Casey (Eng), Palmer (US)
Selected others: -2 Mickelson (US), McDowell (NI) 17, -1 Willett (Eng), T Watson (US), Gallacher (Sco), McIlroy (NI), B Watson (US) Level Harrington (Ire) +1 Poulter (Eng), Westwood (Eng) +1 Woods (US) 15, Donaldson (Wal) 15
Image source, EPAMcDowell clubbing up the hill at 18. That choppy swing of his and he's overdone it, racing it through the back. Spieth stays -7 after 17, that cack-handed grip of his works a treat.
Image source, ReutersGarcia creams his drive down the middle at 15, never been much wrong with his long game. Spieth has a left-to-righter for birdie at 17 and that's a beauty, he'll tap in for par to stay -7. My apologies, this tap-in for Woods at 15 is for par... it's a slippery one but it's straight in. Tiger stays +1.
Image source, Getty ImagesGarcia and Day are inseparable, Day follows in his playing partner for a birdie of his own. Woods very nearly finds the drink with his second at 15 but his ball digs in on the bank. Woods's third shot is decent, if a little bit firm, but he should make birdie from there.
Image source, AFPGarcia in a spot of bother at 14, chipping on... NAILED IT! If that hadn't gone in, it would have ended up in South Carolina. The Spaniard is now four under, three off the lead.
Jay Townsend
Former American professional golfer on BBC Radio 5 live Sports Extra
"I don't think any of us thought Tiger would chip and putt the way he has today. He had a perfect opportunity to blade it through the 11th and into the water but he played an excellent shot."
Jack Nicklaus may lead the way with six Masters wins, but who has this course nailed down to a tee?
If we take players to have completed 50 rounds or more before today's start, Tiger Woods delivers the lowest average score of 70.86 strokes. Next comes 'Lefty' Phil Mickelson on 71.21, with Fred Couples third with 71.91.
Couples has not had a great day, though, and will bump that average up somewhat - he is five over through 16.
Image source, Getty ImagesThe average score around Augusta - based on a par 72 - is 74.17, so the marks above are all the more admirable.
Spieth takes aim at 17 and that's a good swing, he's given his ball a right old rollocking. Harrington in with a 72, could have been better, could have been worse, he'll take it. Fowler not having a great day but he hits the pin at 14, although he might have been better off missing it.
Woods on tee at 15 and he's clattered it into the gallery. "Tiger, you dumbass," says Woods, as scattered patrons scrabble around in the pine straw. Probably would have been better off shouting 'fore!' instead...
Image source, Getty Images
Image source, Getty ImagesSpieth with a good save at 16, he stays -7 and two clear of the field. Three straight birds for Stenson between 13 and 15, the Swede looks to be shaking off that fever of his as his round progresses, he's now +1.
Image source, Andrew RedingtonWe have lots of pictures from day one of the Masters in a special gallery on our Facebook page., external
Iain Carter
BBC golf correspondent on Radio 5 live
Image source, Getty ImagesBobby Jones thought naming the event "The Masters" was too presumptuous but relented in 1939 when the tournament assumed its current identity.
Image source, AFPDay curls his eagle putt close at 13 and taps in for birdie and -3. Garcia also goes close with his eagle attempt, also moves to -3.
Woods aiming way left with his irons today, every shot a cut, and he's not happy with his approach at 14. Playing partner Jamie Donaldson of Wales is on the same score, +1. Spieth with a long-ranger for birdie at 16... work to do to make par...
Our vote is closed and you, the BBC Sport audience, seem to think Tiger Woods is done for major championships.
A whopping 69.5% of you say he will not add to the 14 he has, 13% of you think he has one more in him.
Incredibly, 5.3% of you feel Woods can summon two more big titles and 12.1% believe he will win more than two majors.
Remember Jack Nicklaus stands four ahead of Tiger on 18. Thanks for your votes.
Image source, AFPDay, Garcia and Fowler all safely on in two at the par-five 13th. Spieth at 16, safely on, nothing more than that. Kuchar has nicked another shot back at 15, he's two under through 16.
Ernie Els, speaking to Sky Sports: "I didn't get off to a great start, my tee shot was way off in the trees and I had to scramble for four. My putting felt unbelievable today and has felt good for a couple of weeks. I am putting well, I felt patient and I felt in control, which is a nice feeling to have.
"Experience always helps, being patient helps, like I was today, waiting for the rounds to develop. But the course can bite you. I have had great experiences here and some bad ones but today was a great one."
Jason Day going with iron at 13, not sure why. He finds the fairway but is a long way back. Garcia has marmalised his tee shot with a three wood, shot gone for Spieth up at 15, he drops to -7. Another up and down from Woods at 13, his short game looks in pristine condition.