Being here all day, I was quite exhausted - I had to drink coffee before the match to stay awake

I decided to play tennis not because I wanted to be a professional player, but because my parents wanted me to get involved in something so I wouldnt be running around the streets in Serbia.

I was motivating him every time. When it was break point I was telling him 'hit a good return because you know you are gonna get many more kisses' [on Jamie Murray

Some of the angles that photographers get on court are not always flattering.

It's not easy, you know, hitting balls every day, and, you know, staying really motivated throughout the whole period. It's normal you're going to have ups and downs.

Dreams Matter because they push you

There are days when I double fault.

Now I have to do a lot more work. I have to train more and do a lot more, you know, work on my body and take care of the little things in order to feel great for my body to be in good shape.

Do you know what punishments I've endured for my crimes, my sins? None. I am proof of the absurdity of men's most treasured abstractions. A just universe wouldn't tolerate my existence.

Viktor Frankl's "Man's Search for Meaning" is the only personal development book that does not mention it.

God's grace will not take you where it cannot keep you.

Whenever I date a guy, I think, 'Is this the man I want my children to spend their weekends with?'

A crash is when your competitor's program dies. When your program dies, it is an 'idiosyncrasy'.

Nothing with God can be accidental.

Language is remarkable, except under the extreme constraints of mathematics and logic, it never can talk only about what it's supposed to talk about but is always spreading around.

We can change who we are. We can improve ourselves in various ways, and we can give ourselves possibilities.

I'm never a failure, unless I quit trying, and neither are you.

Any one who believes that any great enterprise of an industrial character can be started without labor must have little experience of life.