Razvan Sabau has found hard courts difficult, recording 5–15 across 20 matches (25.0%). 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 (Australian Open & US Open): Razvan Sabau has yet to record a win on hard at this stage — 0–2 across 2 Grand Slam matches. Breaking through here would mark a significant step forward 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: 1–5 (16.7%); best-of-three: 4–10 (28.6%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on hard.

Best season: 1997 — 2–4 (33.3%) from 6 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.