Marc Leishman and Sergio Garcia secured the clubhouse lead during a thrilling first round at the US Masters on Thursday.
                                
Marc Leishman: Secures clubhouse lead 
 
 
Leishman  raced to six under par earlier on in the day, with an  astonishingly  good performance on the back nine. He scored birdies on  holes 10, 13,  14, 15 and 16. It was a tremendous response from Leishman,  who actually  hit a bogey on the first hole of the day. 
On  an afternoon where the underdogs seemed to thrive, Garcia  erased  doubts that he would be able to compete at August National. He  joined  Leishman at the top of the leaderboard, after producing a  bogey-free  round and a very impressive front nine.  
Fred Couples, a former champion here at Augusta National, rolled  back  the years as he scored birdies on the second, fifth, eighth, 13th  and  17th during his first round. His only blemishes on a beautiful   afternoon were the bogeys on the par-three sixth and the 18th. 
Couples proved once again that there is no substitute for  experience on  the fast greens at the Masters. After his younger playing  partner  Dustin Johnson misjudged his put at the par-four tenth, Couples  just  tapped the ball slightly to his left before allowing it to run down  the  green and into the hole. 
Johnson got his campaign off to a sublime start with birdies at  the  first and second holes to announce his arrival at Augusta National.   Johnson, who has the ideal game to succeed at the Masters, played   aggressive golf 
throughout and was handsomely rewarded for his efforts. 
The highlight of his round came at the par-five 13th, where he  holed a  magnificent putt to take him to five under par for the day with  five  holes to play.   
Fourteen-year-old Guan Tianlang showed maturity beyond his years  at  critical times during the day. He finished on one over par for the  day,  but he had several memorable moments. None more so than his birdie   putt off the edge of the green at a packed 18th.  
With veteran Ben Crenshaw and the spectators looking on  anxiously, Guan  read his putt to perfection on a green which troubles  the experienced  players in the game.  Guan also hit a magnificent second  shot on the  par-four tenth, setting up another exceptional birdie for  the young  man. 
It was also a memorable afternoon for former champion Trevor  Immelman,  who finished the round in a tie for sixth on four under par.  
Immelman has faced considerable adversity since he won the  Masters in  2008. However, he made his intentions clear in a bogey-free  round on  Thursday. 
Matt Kuchar announced his candidacy for the Masters title, after  he  scored five birdies in eight holes midway through his round. He  scored  impressive birdies on holes seven, eight, nine, 13 and 14. Kuchar  is  often 
associated with consistency and he proved why. At the time  writing, his round had yet to be completed. 
Also keeping themselves in contention on a low scoring first  round were  Ricky Fowler who finished on four under par alongside  Immelman,  Couples,  David Lynn and Gonzalo Fernandez-Castano.  
Tiger Woods couldn't break into the top ten during his round,  which he  finished on two under par. Joining him in a tie for 13th are  Phil  Mickelson, Justin Rose, K.J Choi, Tim Clark, Lee Westwood and David   Toms.  
Just one shot ahead of them in a tie for tenth are Zach Johnson, Jim Furyk and the Australian Adam Scott.
 
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