Argentina's oldest registered tennis player, thought to be the oldest formally competitive tennis player in the world, says the sport is the secret to his longevity.

95-year-old Artin Elmayan is in an age bracket all his own and has to play against younger opponents if he wants to compete in regional tournaments.

"Eighty-five plus, because there isn't anyone who's 90, much less 95. So I have to play against 85-year-olds," Elmayan said.

The energetic senior trains at his club in Buenos Aires three days a week to keep in tiptop form.

"I do all right, sometimes I take second place. Last year I won second place twice. It depends on the state of my opponent, and my own. There are no enigmas here," he added.

He says he never had any formal training and picked up the sport as a hobby when he was 39.