This is my solution for the Tennis Refactoring Kata of Emily Bache (https://github.com/emilybache/Tennis-Refactoring-Kata).
I suggest every one to try this kata to improve your refactoring skills :)
To run my tests:
php composer.phar dump-autoload
phpunit
Please see TennisGameImpl.php to watch my refactoring or checks my commits.