Jeff Borowiak has found grass courts difficult, recording 33–42 across 75 matches (44.0%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar.

At Grand Slam level (Wimbledon): Jeff Borowiak is 19–18 (51.4%) across 37 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

vs. Top 10 on grass: 1–5 (16.7%, 6 matches). Top 10 opponents have represented a clear ceiling on grass; addressing that deficit is the single biggest lever for improving the overall record here.

By format on grass — best-of-five: 18–18 (50.0%); best-of-three: 15–24 (38.5%). Significantly better in five-set matches — a strong physical profile on grass that tends to tell as matches and tournaments progress.

Best season: 1982 — 10–6 (62.5%) from 16 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.