Hans Kary has found hard courts difficult, recording 26–33 across 59 matches (44.1%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Claimed 1 title on hard: Lagos.

One final reached on hard, converted into a title — a perfect finals record on this surface. 2 semifinals. 7 quarterfinals.

By format on hard — best-of-five: 2–2 (50.0%); best-of-three: 24–31 (43.6%). Slightly better in five-set matches on hard — a positive sign for the Slams specifically.

Best season: 1977 — 5–3 (62.5%) from 8 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.