I try not to worry about things that I can't control.

There's always going to be somebody who takes a dislike to you and you can't waste time worrying about it.

I've been to three Olympics and I don't feel I've ever quite achieved my best at any of them.

I don't like going away from my children.

No one remembers who came fourth.

I have not had the chance to go out there and do myself justice in an Olympic marathon yet. I have not been able to get to an Olympic marathon injury-free yet.

It's important that athletes can compete on a level playing field. And youngsters coming into the sport can know that if they are working hard and training hard, they'll see a true reflection of where they stand and what they can achieve worldwide and not be swayed by people who are cheating.