Z serving for points! Most folks tend to have a Z serve. Good-but how many have three or four different Z serves? Your opponent will get used to your Z serve eventually so you have to have more than one in your arsenal.
Here are three variations to ponder.
1. Start high and hit low into the wall -Z serve high to low!
2. Start low and hit high into the wall-Z serve low to high!
3. Now hit a medium Z serve and do not hit it hard, but let it roll off the racquet. The roll Z–
Now you will have three Z serves-high to low, low to high, and the roll Z.
You are in business and with all three you can sneak a drive serve to the opposite side of the court off the same motion you use.