PACIFIC PALISADES (AP) — Aaron Baddeley has won the Northern Trust Open for his first PGA Tour victory in four years.

In a battle of two generations, the 29-year-old Baddeley didn’t make a mistake over the last six holes at Riviera to hold off Vijay Singh and 51-year-old Fred Couples, who was trying to become the oldest PGA Tour winner in more than 35 years.

Baddeley closed with a 2-under 69 for a two-shot victory over Singh, who turns 48 on Tuesday.

Couples birdied the opening three holes for a one-shot lead that revved up Riviera, but it all changed on the seventh hole — a birdie by Baddeley from the fringe, a double bogey for Couples.

It was the third career PGA Tour win for Baddeley, who had fallen to No. 224 in the world. This gets him back to the Masters.

(Copyright 2011 by The Associated Press. All Rights Reserved.)