It was all change at the Masters on day two with, Sergio sinking while Jason Day jumped up into the outright lead. Jason Day / Redington / Getty Images Jason Day shot a -4 under par second round to lead the tournament at -6 under par, and by just one shot from high-flying fifty-three year old Freddie Couples, and Aussie first round leader Marc Leishman. Jason spoke of the pressure on his shoulders, on trying to become the first Australian to win the Masters; " Obviously there's a lot of pressure on my shoulders, being from Australia and no Australian has ever won the event. They have been very, very close, but I've just got to try to get that out of my mind and just plug away. It's all how you look at it. If you look at it as pressure, you're going to worry about it more. If you look at it as a challenge and an opportunity to be the first and stay positive with it, you know, it only motivates you to play well. So I've just got to really not think about it at all I really need to stay committed to the game plan, stay aggressive to my target and just not worry about anything else but hitting the shot in front of me." Freddie had a -1 under par 71 second round while Marc Leishman stumbled to a +1 over par 73, the same score as David Lynn, David is now tied in the group of players sitting tied in seventh place. There are seven competitors in that position, including Tiger Woods, Adam Scott, Jason Dufner, Lee Westwood, Justin Rose and K.J. Choi. Angel Cabrera, Jim Furyk and Brandt Snedeker are all tied in fourth place, at -4 under par. This Championship is still wide open, anyone shooting a real low round tomorrow will definitely put themselves in the box seat for the final round on Sunday. It was a day of bad luck for some, Chinese amateur Tianlang Guan was penalized one shot for slow play, the first player ever to be punished for this offence for 77 years at Augusta National. A very harsh penalty when you witness some of the slow play out there today, the second round took thirty-six more minutes to complete than the first round, hard to believe that only one player is penalized for slow play. Makes you wonder why none of the Professional players were not penalized. Tianlang still made the cut, right on the number of +4 over par, along with defending Champion Bubba Watson. Before he started play today Tianlang said ; " If I can make it, I would be really happy for it, but if I didn't make it, it's still a great week." A great week indeed for the Chinese youngster. Gary Player remarked about the Tianlang incident; " One of the saddest things I’ve seen in golf. When I heard, I prayed that he would make the cut." Tiger Woods had an approach shot hit the pin and ricochet into a water hazard on the par 5 fifteenth hole. Tiger assessed the shot as being a good one; “ The sun was in my eyes, so I knew I started the ball on the flag. I didn't know if I cut it enough, but evidently it was a really good one." Finally on this incident impacted day, the big names who managed to miss the cut; Last weeks winner Martin Laird, Matteo Manassero, who played alongside Tianlang, Graeme McDowell, Louis Oosthuizen, Webb Simpson, Ian Poulter and Padraig Harrington.