Hugo Dellien has found hard courts difficult, recording 5–16 across 21 matches (23.8%). 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): Hugo Dellien has struggled at Grand Slam level on hard: 1–7 (12.5%) in 8 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

vs. Top 10 on hard: 0–3 (0.0%, 3 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: 3–10 (23.1%); best-of-three: 2–6 (25.0%). Consistent regardless of format on hard — a sign of a well-rounded game that holds up as matches develop.

Best season: 2019 — 3–3 (50.0%) from 6 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.