Ken Flach has found hard courts difficult, recording 30–42 across 72 matches (41.7%). 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 (Australian Open & US Open): Ken Flach is 8–6 (57.1%) across 14 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

ATP Masters 1000 on hard (Indian Wells, Miami, Canada, Cincinnati, Shanghai, Paris): a positive 2–2 (50.0%) across 4 matches — winning above .500 at this level, week in week out, is a genuine sign of quality on hard.

vs. Top 10 on hard: 0–5 (0.0%, 5 matches). Top 10 opponents have represented a clear ceiling on hard; addressing that deficit is the single biggest lever for improving the overall record here.

By format on hard — best-of-five: 10–8 (55.6%); best-of-three: 20–34 (37.0%). Significantly better in five-set matches — a strong physical profile on hard that tends to tell as matches and tournaments progress.

Best season: 1984 — 3–2 (60.0%) from 5 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.