Dan from Claygate: After reading your donner meat calzone remark (1918) I have just demanded my girlfriend find me one for dinner, at any cost.

Adam Scott in the pine straw on 13, Mickelson country. His second at the par five, on to the dance floor with a decent chance of at least two-putting for a birdie. Matt Fitzpatrick, though, is in Rae's. Lee Westwood has parred the first.

BBC Radio 5 live

BBC Radio 5 live, whose Masters coverage kicks off at 21:00 BST tonight, have set a little quiz to stretch your grey matter over.

Know which is the longest par-five on the course? Remember Tiger Woods' winning margin in 1997? Then you could be in the money.

N.B. no money is actually on offer. But you can feel smug at least over at the BBC Radio 5 live Facebook page. , external

Image source, AP

Stephen Gallacher is setting about debunking any theories you need experience around Augusta with a score of three under and second place at the turn. Rory McIlroy is among the chasing pack on one under with veteran Sandy Lyle, but the trio aside, red numbers are proving hard to come by for the Brits abroad. Luke Donald had a nightmare double-bogey start but replied with consecutive birdies and is level par with Welshman Jamie Donaldson.

Jack Nicklaus on his 1986 Masters win, external: "I can still feel it, I just can't find it."

Rob Hodgetts
BBC Sport at Augusta National

Like a slow-motion silent disco for sworn enemies, they creep around each other, careful not to get in the way, avoiding eye contact.

Phil Mickelson, Ernie Els, Justin Rose and Lee Westwood engage in a dance that might seem surreal if you didn't know better. Lips pursed, heads bowed, eyes impassive under the peaks of caps or visors, they putt in a bubble, lost in their own world, in the minutes before their tee times.

Mickelson's caddie Bones is watching the group ahead play the first. He breaks the reverie to point something out to his man. Mickelson peers down the hole and then resumes his ritual.

"Plenty of time," says Bones. But soon the clock calls and Mickelson, in the black of a gunslinger, is cheered through a chute of patrons to the first tee. Playing partners Rose and Els follow.

A nod to Mickelson's first win 10 years ago there, when he beat Els by one in a terrific tussle on the final day. Mickelson hits the best one, Els's is fine, Rose in pine straw to the left.

-4 Haas (US) 14; -3 Gallacher (Sco) 9; -2 Couples (US) 16, Scott (Aus) 12; -1 Jimenez (Spa) 14, Snedeker (US) 13, McIlroy (NI) 11, Garcia (Spa) 2.

Selected others: E Fowler (US) 15, Donaldson (Wal) 13, Mickelson (US) 1; +1 McDowell (NI) 15, Donald (Eng) 2; +3 Poulter (Eng) 17

I've just been told that the first-round stroke average currently stands at 75.5. That's 3.5 over par. Freddie Couples (it's impossible to call him Fred, right?), drops a shot on 17 to slip back to one under.

Debate on the live text desk turns to Masters rituals. I know plenty of people who do nothing else for four evenings than follow the golf. No going out, not even leaving the sofa. Snacks at arm's length, mobile switched off.

I can also tell you that the live text team has a traditional Masters Sunday evening takeaway. Donner meat calzone for me. I didn't know such a thing existed until the year Bubba Watson won.

Image source, AP

Ben Crenshaw, champion in 1984 and 1995, has finished his round at 11 over par and rank last.

Better news for another two-time Augusta winner. Tom Watson is all done for the day with a six-over 78. He was chugging along merrily on three over until picking up strokes on the final two holes.

But which is older?

Watson is the slightly more advanced. His 63 years are one more than Crenshaw has on the clock.

In the space of five minutes or so, Bill Haas has gone from a shot off the pace to the leader by two. Haas, the 2011 FedEx Cup winner, birdies the par-four 14th to go four under and open up a two-stroke advantage on the chasing pack of six men. Hang on, this is all changing so quickly. Scotland's Stephen Gallacher birdies nine to go to three under on his own.

McIlroy coming down 12 after Phil Mickelson and Justin Rose take par at the first. Lee Westwood is part of the final group of the day, just heading down Tea Olive.

Par five, 510 yards

Reachable in two, but those who fall short run the risk of slipping into the water at the front of the green. Go long, and four bunkers wait behind. The putting surface is four-tiered and having to three-putt is a real danger. It was from the trees and pine straw on the right of the fairway that Phil Mickelson produced a moment of magic on the way to the Green Jacket in 2010.

2013 average: 4.75 Rank: 15

Image source, Getty Images

The leader 10ft away to keep at least a share of the lead. Snatched swing, going past on the left at lightning pace. He didn't look too comfortable and swipes the air with his putter in frustration. After finding water at 12, Scott has dropped two to go back to two under. Bill Haas leads on three under as Scott heads for 13.

Brilliant up and down from Brandt Snedeker sees him birdie 13 to move to two under. Matt Fitzpatrick was building sand castles on 12 and now has a long putt for par. Dennis the Menace shirt, white strides...wonderful hold. Now Scott for bogey after Sergio Garcia birdies the second...

Rory McIlroy on the 11th, monster putt for a birdie. Downhill, lighting fast. Good effort to hold. Adam Scott's third after that dip on 12. Chipping from the fairway, 10ft from the pin. Testing for bogey, but you fancy him from there.

Stephen Walker:, external When I was 16, I was working as a runner to the American Broadcaster Commentary Box above the 18th green at the 1986 Open at Turnberry (lots of Sandwiches and Fizzy Drinks were requested). Jack Nicklaus finished his interview after just missing the cut, as he exited the box it was pouring with rain and I escorted him down the stairs under my umbrella then through the crowds to his car in the players car park. We had a conversation about what I wanted to do in the future - he thanked me shook my hand, signed my programme and gave me his glove and ball.......Legend.

Now then, Scott on the 12th tee. Caddie Steve Williams, tanned chest poking from under his white boiler suit, utters words of advice. Patrons sit behind as Scott winds up. Sun glinting off the club head as he swings....it's in the drink! Scott has found water at 12! The leader and defending champion is swimming at Amen Corner. Pitching on to the slope in front of the green, bouncing back and wet.

The sun has come out for the opening day at Augusta. Thorbjorn Olesen stands in the shadow of a tree as he misses a par putt on 12. One hole ahead, Bill Haas has birdied 13 to go to three under, one behind the leader Scott.

Lee Westwood is about to tee it up and the 40-year-old has now gone 63 starts without achieving a victory in a major tournament - more than anybody in the field. Miguel Angel Jimenez has played 62 majors without victory, Sergio Garcia 61 and Steve Stricker 60. Adam Scott went 47 straight majors without a victory before winning the Masters last year.