Dufner is joined in the field by fellow American Bo Van Pelt and South African Charl Schwartzel.
Schwartzel, the 2011 Masters winner, reached the semis of last week's Turkish Airlines World Golf Final and feels his game is taking shape again after he beat both Rory McIlroy and Tiger Woods in the Group stage.
Schwartzel said: "I built some good confidence last week playing against them (McIlroy and Woods) and I just showed that the game is still there somewhere.
"So I've got some good confidence last week and I'm really excited for this week."
