ONE TIME OFFER: Want to learn how to train on the court to make all the new strategies you’re about to learn an automatic habit? Partner Proof Training is a special program containing step by step training videos focused on creating the perfect practice routine to master your new 41 strategies whether you have a hitting partner, ball machine or are all alone. Make every second of your very next hitting session really count by following this training! Add to your order for just $19 by clicking the box above. This is the PERFECT addition to your new Partner Proof Doubles membership!