Sanath Jayasuriya admitted the Twenty20 format suits his game despite his advancing years after belting 81 against West Indies as Sri Lanka won their final group match.

The opening batsman turns 40 this week but looked as good as ever as he cracked 10 fours and three sixes in his side's 192 for five.

The veteran has been a lynchpin for his side for almost two decades and he has always thrived in limited overs cricket, and remains focused on what he does best.

"I'm doing perfectly well and that's the only thing for me. There is no worry about my age, you just go out and play," he said. "It suits me like that because my natural game is attacking cricket.

"I enjoy these Twenty20 games and it's been really good to play in them. You need to be really fit and work very hard on your game so at the end of my career I am very happy to have the opportunity.

"It's really hard work though and it's tough to keep up with these youngsters!"

Jayasuriya paid tribute to opening partner Tillakaratne Dilshan, who made 74 in 47 balls courtesy of a series of improvised sweeps and paddles.

"Dilshan has been playing really, really well," he said. "It shows good confidence when you can play that way. With the way he is playing, I know I can just play my game.

"That's a big advantage to us. When you see him playing some of those shots I can't even believe it standing at the other end. It's nice to see him doing that and I get confidence from it.

"I can't play shots that are improvised that much though; I don't even think about it.

"When I got out I thought about playing some right-handed shots but I can't do that, that is for Dilshan only. He never fears playing his own shots."