Marc Flur has found hard courts difficult, recording 21–32 across 53 matches (39.6%). 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): Marc Flur has struggled at Grand Slam level on hard: 1–5 (16.7%) in 6 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

4 quarterfinals on hard, including one run to the semifinal — regularly reaching that stage is a solid baseline, with the next step being to break through to the final rounds more often.

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: 4–7 (36.4%); best-of-three: 17–25 (40.5%). Slightly stronger in three-set contests on hard, though the five-set record is still respectable.

Best season: 1987 — 8–8 (50.0%) from 16 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.