Dustin Johnson does it easily at the HSBC Champions event at Sheshan International Golf Club, Shanghai, China with a three shot winning margin. Dustin Johnson / Getty Images Dustin's final round of -6 under par 66 included an Eagle two at the par four 16th hole and a birdie two at the par three 17th. He finished the tournament with a -24 under par total. Dustin said that he was under pressure at the start because of his slow start to the round compared to Ian and Graeme; "I didn't get off to the best start and Poulter and McDowell got off to great starts and put a lot of pressure on me, but I am swinging well and putting well so I thought just stick to my game plan and play the golf course how I want to play it and it's going to come. I played really well the last few holes on the front nine and then had a great back nine. The guys made it really interesting but I just played really well coming down the stretch. The last few holes here you can make some birdies. It was a lot of fun out there, it was a good match from both of them. They put a lot of pressure on me but I am really proud of myself and the way I handled it. It takes a while to learn that maturity and patience, I wish I would have had some of that a few times a few years ago, but you learn from your mistakes and try to get better from them and I think I showed a lot of patience and a lot of discipline with clubs I picked and shot selection. This is probably my biggest win and hopefully there are better things to come." In second place on his own at -21 under par was defending Champion Ian Poulter. Ian matched Dustin's -6 under par 66 final round score, but sadly it was not enough for him to retain his trophy. Third spot was secured by Graeme McDowell, finishing the tournament on -20 under par. He also had a final round -6 under par 66, but could not reel in Dustin. Sergio Garcia had a super final round of -9 under par 63, a par at the par five 18th robbed him of the chance to equal the course record. Sergio finished in fourth place at -18 under par. Justin Rose completed the tournament at -16 under par, just one shot ahead of the improving Rory McIlroy at -15 under par.