(Video shot in Sun Valley, Idaho)… Many times at the 3.5 level I’ve noticed a common error that happens in doubles when a player is returning a second serve in a pressure situation.  The tighter the match, the more chances of it happening. The score is 4-5, 30-40, and you are the receiver.  The server misses her first serve and you and your partner have a set point with a second serve coming! And your thinking...