'When you're at the front it can be more difficult to keep your concentration,' he said.

Two days later, Capriati couldn't keep her concentration from snapping under pressure.

Hartwig was unable to keep his concentration and failed three times at 19-8 1/4.

I panicked, and found it increasingly difficult to keep my concentration.

He tried to listen to Manny's opening statement but couldn't keep his concentration.

We just tried to keep our concentration to get through it.

She was good at this kind of thing; she didn't find it difficult to keep her concentration.

Just do whatever you need to do to keep your concentration.

When you're up by 20 points, you have to pretend it's a close ball game and keep your concentration.

Keep your concentration on the here and now, where it belongs.