http://www.englishclub.com/vocabulary/sports-tennis.htm
http://tennis.lifetips.com/cat/7343/tennis-terms/index.html
http://www.stgeorges.co.uk/blog/tennis-vocabulary-practice-grand-slam-report/
Something fun, a little tennis vocab quiz http://www.englishclub.com/esl-quizzes/sports-tennis.htm
A little `hangman` game for Tennis terms http://www.eslall.com/exercises_212_l0.html
Word search game for Tennis terms http://www.eslall.com/exercises.php?selexercise=428&language=0