How well do you practice on a daily basis?
I mean.
Do you play up to your full potential in every practice or not?
Those are a few powerful questions that you need to be asking yourself today and be honest with the answers that you give.
Then get to work on becoming more productive and...
If you do your research on the great coach Harry Hopman.
You will find that, he coached the Australian Davis Cup team for 20 years and developed all the top players over there and also worked with McEnroe and Gerulatis when they were young in the US.
I learned from Jim Corbertt in Missouri...