Singh (left) has eclipsed Woods throughout the season

Singh replaced Woods as the world's best after winning the Deutsche Bank Championship in September and Woods has since dropped to third.

"As you get older you have to keep adjusting to your golf swing, your body does not stay the same," said Singh.

"I have adjusted for the better and I don't think he has done that."

Academy: Tiger's swing woes

Prior to his fall down the rankings behind Singh and Ernie Els, Woods had held the world number one spot for five years.

The American dominated world golf during that time, winning the majority of the biggest tournaments.

Singh said the 28-year-old's problems had been caused by his body altering as he has matured.

"I think it's his body change," said Singh.

"When he first came on the scene he was extremely strong. I'm not saying he's not strong now but you do slow down a little bit. The golf swing has to match your body ability.