Hot on the heels of the tennis U.S. Open, the celebrity trainer Steve Jordan—whose clients include Ariana Huffington, Dustin Hoffman, Gerard Butler, and many others—shares five dynamic exercises to help RobbReport.com readers improve their performance on the tennis court. As part of a regular training and conditioning routine, performing these simple exercises three times a week can help players gain the competitive edge they need to play and recover like a pro.

Add power to your serve, forehand, and backha…