Sometimes, beating your regular training partners, fellow club members, and best friends in table tennis can be very difficult because it seems that they know your every move.  They can predict that your forehand flip will go crosscourt, they can predict that backhand serve will go long to the middle, and they can predict that you will block to the corners.  They know your every move because they have played against you hundreds of times.  There are 2 solutions to overcome these problems: