Learn Kick Serve from the Pros - Sam Stosur

Sam Stosur born 30 March 1984 is an Australian professional tennis player, well known for her powerful serve, which is among the best in women's tennis. She is a former World No. 1 in doubles.
Stosur has won a total of five Grand Slam titles to date; one in singles at the 2011 U.S. Open; two in women's doubles; and two in mixed doubles. She was also a finalist at the singles event at the 2010 French Open.

Marin Cilic born 28 September 1988 is a professional Croatian tennis player. His career-high ATP singles ranking is World No. 9 hitting a high kick serve to Roger Federer backhand