Getting into the correct position behind the baseline after serving, before the third shot. Many players' serve momentum brings them into the court, and failing to retreat costs them balance and positioning on the critical third shot.
After completing the serve motion, immediately recover behind the baseline. The serve's weight transfer naturally pulls you forward — conscious effort is needed to get back. Position yourself with enough space to play the third shot comfortably off either side. If you can't retreat in time, you must be comfortable playing a short-hopped third shot drop off both forehand and backhand.
The harder you serve, the more forward momentum pulls you INTO the court. Most players serve hard and hope they'll have time to retreat — then get caught hitting their third shot while still moving forward with narrow steps that can't control momentum. The fix isn't serving softer — it's building the retreat into the serve routine as a non-negotiable step. The recovery starts before the serve is even struck.