小時候 - Tennis players in childhood

這些孩子們都長大了，認得出來嗎？

解答：Rafeal Nadal, Novak Djokovic, Roger Federer and Andy Murray 

圖片來源：

http://www.actusports.fr/46072/photo-nadal-djokovic-federer-murray-enfants/

http://www.tennisperspective.com/2010/12/tennis-players-as-kids-nadal-federer-ivanovic-and-more.html

http://www.menstennisforums.com/showthread.php?p=11384273

http://pinterest.com/shiameng/roger-federer/

http://www.dailymail.co.uk/femail/article-1197595/Tennis-stars-father-reveals-What-really-upset-Andy-The-day-Judy-walked-us.html