Wales coach Ryan Giggs is convinced former Manchester United teammate Cristiano Ronaldo can play into his 40s.
The Juventus forward turned 35 in February but has showed no signs of slowing down in his twilight years.
Last season he finished second top goal scorer in Serie A with a tally of 31, before breaking the 100 barrier at international level with Portugal on Tuesday.
"He'll have to be at the right club obviously. I was at a top club and played until I was 40, and I can see him going on and playing until he's 40 as well," Giggs told PA.
"He looks after himself - he eats right, rests right and lives for the game - and is the best professional I ever played with.
"I saw him at the start of his career and you could never foresee him going on to score this amount of goals.
"He was a talent and a brilliant player who excited you. Cristiano was always a student of the game, and just like me he always looking for that extra edge.
"He was always in the gym and had it in his mind how good he could be. He scored 40 goals in one season at United and since then what he's done is remarkable."
