Juan Martin del Potro has an impressive hard court record of 311–119 across 430 matches (72.3% — strong). A win rate of that calibre over 430 matches is a reliable indicator of genuine quality on this surface. With 18 titles, among the most prolific hard court champions in the Open Era: Los Angeles, Washington, Auckland, US Open and 10 more.

At Grand Slam level (Australian Open & US Open): Juan Martin del Potro has been outstanding — 54–18 (75.0%) across 72 matches. Winning more than 7 in 10 Grand Slam matches on hard is the benchmark of an all-time great on this surface.

ATP Masters 1000 on hard (Indian Wells, Miami, Canada, Cincinnati, Shanghai, Paris): Juan Martin del Potro is elite here — 84–43 (66.1%) across 127 matches. Sustaining that win rate in the Tour's deepest regular-week draws is a defining quality of the very best on this surface.

31 finals reached on hard — won 18, lost 13 (solid 58% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on hard. 47 semifinals. 65 quarterfinals.

vs. Top 10 on hard: 42–53 (44.2%, 95 matches). Competitive against the elite, but still narrowly below .500 — closing that gap would directly elevate the overall hard court profile.

By format on hard — best-of-five: 61–20 (75.3%); best-of-three: 250–99 (71.6%). Slightly better in five-set matches on hard — a positive sign for the Slams specifically.

Dominant season: 2018 — 36–9 (80.0%) from 45 matches. A campaign of 36 wins on hard in a single season is among the best single-season records the surface has seen — the clearest benchmark of what is achievable at peak level.