Jan-Lennard Struff has found hard courts difficult, recording 133–163 across 296 matches (44.9%). 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): Jan-Lennard Struff has struggled at Grand Slam level on hard: 12–23 (34.3%) in 35 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

ATP Masters 1000 on hard (Indian Wells, Miami, Canada, Cincinnati, Shanghai, Paris): Jan-Lennard Struff is 28–38 (42.4%) across 66 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole hard swing.

8 semifinals on hard without yet reaching a final — consistent deep runs that show the ability to string together wins across a full draw, with the step to the final still to come. 20 quarterfinals adds further depth to that picture.

vs. Top 10 on hard: 7–28 (20.0%, 35 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: 12–25 (32.4%); best-of-three: 121–138 (46.7%). 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: 2020 — 14–12 (53.8%) from 26 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.

Recent Form 2026: 5–10 (33.3%) on hard. Last 10: L L L L W L W L W L — mixed results, some inconsistency in the current period.