Why do I double fault so much?

Usually because the second serve is hit flat and slowed down. A slow flat ball has little margin. Spin lets you swing freely and still bring the ball down into the box, and a steady routine helps with the nerves that make the arm tighten up.

Should my second serve be a kick serve?

A kick or topspin serve is the most common choice because it clears the net high and bounces up away from the returner. A slice serve can also work as a second serve, especially for newer players who are still learning the kick.

How to Hit a Reliable Second Serve

5 video lessons

Spin, height and a full swing so the second ball goes in.

Quick answer & tips ▾

A good second serve is not a slower first serve. Slowing the arm down usually makes it less reliable, because a soft, flat ball has nothing pulling it down into the box. Instead, keep the swing speed and turn more of it into spin, usually topspin or kick, so the ball clears the net comfortably and still dips in.

Use a continental grip, toss slightly more over your head than on a first serve, and brush up the back of the ball. Aim well over the net and well inside the lines. Most double faults come from tension and a short, guided swing, so commit to the full motion.

Key tips

Keep your racquet speed; add spin, not caution.
Aim one to two meters over the net.
Pick a big target well inside the service box.
Use the same pre-serve routine every time to calm nerves.

FAQ

Why do I double fault so much?: Usually because the second serve is hit flat and slowed down. A slow flat ball has little margin. Spin lets you swing freely and still bring the ball down into the box, and a steady routine helps with the nerves that make the arm tighten up.
Should my second serve be a kick serve?: A kick or topspin serve is the most common choice because it clears the net high and bounces up away from the returner. A slice serve can also work as a second serve, especially for newer players who are still learning the kick.