ST KILDA co-captain Nick Riewoldt has urged veteran teammate Robert Harvey to consider playing on in 2008.

Writing for the St Kilda website, Riewoldt said Harvey was in his best form and was the club's most consistent player this season.

"I don't want to pre-empt his future beyond this season," Riewoldt said, "but the type of form he's in at the moment, if he can continue that throughout the year and keep managing his body the way he does, then really there is no reason why he couldn't keep playing on next year.

"This is my seventh season at the club and, to be perfectly honest, I've never seen him play better footy than he is at the moment. Either in our wins or our losses, Harvs has been outstanding. He's been in as good as form as I've witnessed first-hand playing beside him."

In his 20th season, Harvey, 35, is the league's oldest player. In round 10, he is due to become just the 10th player to reach the 350-game milestone.

"It's just remarkable and mind-boggling to see him playing the football he is at 35 years old," Riewoldt said.

Of his own form, Riewoldt said: "I'm gearing up towards full game time now. I've been playing about 75 to 85 per cent of the match, but I'm still not quite playing the whole game. Hopefully, in the next couple of weeks, I can really run out games."