Hong Kong (CNN) -- Not your average great-great grandfather, Fauja Singh has completed nine 26-mile (42-kilometer) marathons since taking up long-distance running just over a decade ago.

On Sunday, the 101-year-old Sikh finished his final competitive race in Hong Kong, putting an end to a sporting career that has raised thousands of dollars for charity and been an inspiration to many around the world.

Nicknamed "Turbaned Tornado" by fans for his distinctive traditional headwear, Singh said he began long-distance running in an attempt to lift the depression that engulfed him after he witnessed the death of his son.

"I suffered a tragic incident in my life, a traumatic experience; I took up running as a new focus in life. And then marathon running developed from there," he told CNN at a training session before Sunday's race.

He completed the 10-kilometer route that wound its way along Hong Kong's harborfront in one hour 32 minutes and 28 seconds -- four minutes faster than his time last year despite a small stumble.

"Five or six kilometers into the race, I really decided to go for it," he said. "I had lots of power today because I was very happy. "

Singh moved to the UK from India following the death of his son and entered his first marathon in London in 2000 aged 89.

In 2011, Singh became the first centenarian on record to complete a marathon after finishing the Toronto Waterfront Marathon in 2011 in eight hours and 11 minutes and six seconds.

1. How old is Fauja Singh
2. How many marathons has he completed?
3. What is his nickname?
4. Why did he start running?
5. how long was today's run?
6. How long did he take to complete it?
7. Was he faster or slower then last year?
8. How much faster?
9. How old was he for his first Marathon?
10. What year did he become the first centenarian to complete a run?
1. 101
2. nine
3. Turbaned Tornado
4. attempt to lift depression
5. 10-kilometer
6. one hour 32 minutes and 28 seconds
7. faster
8. four minutes
9. 89
10. 2011