Done Quote by Andy Roddick
“Most players who play tennis love the game. But I think you also have to respect it. You want to do everything you can in your power to do your best. And for me, I know I get insane guilt if I go home at the end of the day and don't feel I've done everything I can. If I know I could have done something better, I have this uneasy feeling.”
![“I've used the Phoenix Centrifuge to replicate what the body's going to go through on the flight up. I've also done some gravity tests with ZERO-G [a charter-flight service in Arlington, Va., that uses modified Boeing 727s to simulate weightlessness], which went great.” quote by Richard Branson](https://sms4smile.com/quotes/img-quotes/aa1/richard-branson-256_adventure_i-ve-used-the-phoenix-centrifuge-to-repl_903.jpg)
