Here is a great way to visualize how to stay side-on longer on your serve. Simply use a rubber band or towel and place it parallel to the tip of your left foot and imagine NOT crossing that line. #stiga #tenniscoaching #tennisdrills #onlinetennisinstructions #onlinetennislessons #onlinetennislesson #onlinetennisinstruction #onlinetennis #tennisteaching #meikebabel #tennistechnique #tennistechnik