Reviewing 286 ATP matches from 2024 in R, first-serve points won% (FSPW) showed a much stronger relationship with hold rate (R^2≈0.62) than raw first-serve in% (R^2≈0.18), and the gap widened on slow hard courts. If you’re coaching or scouting, are you optimizing for serve quality proxies (location/speed clusters and +1 ball effectiveness) rather than chasing more first serves in, and which drills or KPIs have moved hold rate for you?
I stopped chasing 65% first serves and built two serve+1 patterns per side; on “slow hard courts” we go deuce wide then forehand into the open court, ad T then backhand body, which bumped FSPW about 4–6% over three events without moving in%. Small caveat: I keep an eye on double faults and second‑serve aggression so the spot-hunting doesn’t backfire late in games.
Same takeaway here: tracking “back-third” first-serves and the % of +1 strikes above shoulder height moved my hold more than in%, especially on slow hard where FSPW ran the show (“R^2≈0.62”). Cheap hack: lay two throw-down lines to mark depth and log those serves in R after practice, then build one pattern per side off that contact-height trigger. Caveat: in heavy wind or vs elite blockers I’ll bump in% and go body more to keep the +1 from starting low.
In R across 2024, ‘FSPW’ wins; tag +1 contact height; wind skews.