Even a fellow like Devore, who had stayed mostly sharp, wouldn't have been exempt from the occasional nick in his edge.

"I'm sure it didn't hurt, staying sharp and in game action," Peca said of playing six games for Canada in the last two weeks.

Hingis once showed up at every event, staying sharp with match play.

Staying mentally sharp is the challenge.

He must have spent considerable time with the techpriests, because it functioned perfectly after that, staying sharp and in focus more than half the time.

Since babyhood he had known that if he worked hard and stayed sharp, he would stay on top.

It helps as far as stamina, staying mentally sharp through a round, and through the course of a week.

I think it's their way of staying sharp.

But anyone who thought this had obviously never stayed up all night between Denver and St. Louis staying sharp on the cards.

"I like the way he's staying sharp."