Although trailing the young-gun Anthony Kim at the beginning of the last day, Vijay Singh drew upon his recent string of victories to take possession of the 2008 Chevron World Challenge championship.
Sweden's Robert Karlsson and Henrik Stenson won the 54th World Cup of Golf by three shots on Sunday after a masterful nine-under-par 63 in the final round foursomes.
Spain's Miguel Angel Jimenez and Pablo Larrazabal watched a four-shot lead disappear as Australia carded a nine-under-par 63 to share top place after the third round fourballs at the World Cup on Saturday.
South Korea's Shin Ji-yai capped a superb 2008 campaign by winning the LPGA Tour's season-ending ADT Championship by one shot in West Palm Beach, Florida on Sunday.
Mexican world number one Lorena Ochoa has been named the LPGA Tour's Player of the Year for the third season in a row.
Phil Mickelson suffered a bogey on his last hole after a spectator took a photo during his swing but the American still closed the gap on leaders Ernie Els and Simon Dyson at the $5 million Singapore Open on Saturday.
Ballesteros was in a stable condition after an operation on Tuesday to remove a brain tumor, the Spanish golfer's doctors said on Wednesday.
Overnight leader Anthony Kim shrugged off an erratic outward nine to grab a two-stroke advantage after the Tour Championship second round on Friday.
Anthony Kim maintained his blistering form from last week's Ryder Cup to charge into a four-stroke lead in Thursday's opening round at the Tour Championship.
The U.S. team won the 37th Ryder Cup at the Valhalla Golf Club in Louisville, Kentucky.