Federico Delbonis has found hard courts difficult, recording 28–75 across 103 matches (27.2%). 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): Federico Delbonis has struggled at Grand Slam level on hard: 5–16 (23.8%) in 21 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): Federico Delbonis is 13–24 (35.1%) across 37 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole hard swing.

vs. Top 10 on hard: 1–9 (10.0%, 10 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: 6–19 (24.0%); best-of-three: 22–56 (28.2%). Slightly stronger in three-set contests on hard, though the five-set record is still respectable.

Best season: 2017 — 4–3 (57.1%) from 7 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.