Joseph Sirianni has found hard courts difficult, recording 6–10 across 16 matches (37.5%). 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): Joseph Sirianni has struggled at Grand Slam level on hard: 1–4 (20.0%) in 5 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on hard — best-of-five: 1–4 (20.0%); best-of-three: 5–6 (45.5%). 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: 2008 — 5–6 (45.5%) from 11 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.