Korea’s Y E Yang described it as “a big mountain over” after becoming the first player through to the second round of the World Golf Championships-Accenture Match Play Championship with a 2 and 1 victory over Graeme McDowell.
For the second year running Northern Ireland's former US Open champion was beaten by Yang, having exited to the same player in the third round last year.
McDowell led after five holes, but Yang took control with birdies on the next two and then a par at the 476 yard ninth, where Europe's Ryder Cup hero double-bogeyed.
A six foot birdie putt on the short 12th brought the gap back to one, but it was the closest McDowell could get and a superb approach to four feet on the 17th allowed the 2009 US PGA Champion to close things out with a birdie.
"I'm playing good - today is a big mountain over," said Yang.
McDowell was out of the 64-man event before top two seeds Luke Donald and Rory McIlroy had even started against South Africans Ernie Els and George Coetzee respectively.
“I made six birdies today, I played decent golf but I ran into a man that played extremely well,” said McDowell.
“I felt like I had to follow him all day long, and I did most of the day, but he didn't put a foot wrong.
“That's the beauty of this tournament. It's not the beauty - it could be the beast of this tournament, as well. You just run into the wrong guy on the wrong day, and you have got your work cut out. I had my work cut out today, and I didn't take care of business, so I’m disappointed.”