Mariano Puerta has found hard courts difficult, recording 16–30 across 46 matches (34.8%). 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): Mariano Puerta has struggled at Grand Slam level on hard: 3–8 (27.3%) in 11 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): Mariano Puerta is 5–9 (35.7%) across 14 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: 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: 6–10 (37.5%); best-of-three: 10–20 (33.3%). Slightly better in five-set matches on hard — a positive sign for the Slams specifically.

Best season: 2005 — 6–6 (50.0%) from 12 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.