The Spaniard has been in the hottest form of his life since turning 40 in January and celebrated soon afterwards with success in the JohnnieWalkerClassic in Bangkok.
Geoff Ogilvy of Australia, who finished second at last year's JohnnieWalkerClassic, was in second place again, two shots behind Woods at 9-under-par, as was Wayne Ogilvy, also of Australia.
Haig, the talented 6ft 4" 22-year-old South African who won his maiden European Tour title at the JohnnieWalkerClassic in 2007 to earn his card for this season, said: "It is all about confidence and I have that right now.