It was indeed disappointing for Bhullar, who at one stage was as high as tied fourth towards the end of the second round. The collapse at the end of the second round is something he was unable to recover from.
Dustin Johnson kept at bay the challenges of defending champion Ian Poulter and Northern Ireland's Graeme McDowell by staging a late comeback with a final round six-under-par 66 to win his first WGC title.
Poulter had to settle for second place after he closed with a 66 while McDowell also signed for a 66 to finish in third place. China's Liang Wen-chong emerged as the highest-ranked Asian after he also posted a 66 to take a share of 15th place with Major winner Louis Oosthuizen of South Africa at the year's final World Golf Championship.
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"This is probably my biggest win, and with the field and the tournament, World Golf Championships, hopefully this is a sign of better things to come," added the American.
Bhullar, who is ranked third on the Asian Tour Order of Merit, knows he has the game to compete on the global stage by virtue of his entry into this week's US$8.5 million showpiece featuring 40 of the world's top 50 players.
"You've got to be playing really well to feature in this week's WGC-HSBC Champions and I've shown that by being here.