I've heard that I should only have about 3 serves in my repertoire. Those serves should have lots of variation. Because I know too many, I'm wondering which to have in my repetoire.
You don’t necessarily ‘need’ lots of different serve actions, but I feel it’s good to have them!!
What I would say is that you should have 2 to 3 serve actions that are your ‘food and drink’ go to serve actions that you can concentrate on when practicing and playing matches.
If you take into account the spin variations, placement (long, short, half long) variations, speed variations and fake motion variation, there are numerous different ’feels’ to learn for 1 serve action alone!!!
Generally the FH pendulum is the go to serve action for left side spin, (ball contacted on the left for a right handed player) the other less common options being the wash wipe serve, and reverse tomahawk serve (which is pretty difficult!!) You need a left spin serve Which is traditionally the FH pendulum.
Then you need a right spin serve - tomahawk, hook/punch and reverse pendulum. Choose one and concentrate on that specific action.
A BH serve, which imparts the same side spin as the tomahawk/hook/reverse pendulum.
When you watch the Pro’s they usually stick to one or two serve actions and have a 3rd as a back up. These are serves that they have pretty much mastered!! that’s why they stick to them, they know the serve and likely receive they are going to get.
They probably have more in their bag but these are likely to be less ‘trained/practiced than the 2 ‘go to’ serve actions.
Sometimes, pretty rarely, a receiver struggles with a serve action. So, you are serving a hook serve and they return it well, change to a reverse pendulum and they make more mistakes. The side spin is the same but the action is harder for them to read. Maybe this is an option later in a game where you are struggling??