Jonathan Stark has a competitive hard court record of 85–102 across 187 matches (45.5%). The record shows a player capable of competing here, though there is clear room to push the win rate higher.

At Grand Slam level (Australian Open & US Open): Jonathan Stark has struggled at Grand Slam level on hard: 6–13 (31.6%) in 19 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): Jonathan Stark is 19–22 (46.3%) across 41 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole hard swing.

4 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. 12 quarterfinals adds further depth to that picture.

vs. Top 10 on hard: 3–16 (15.8%, 19 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: 6–13 (31.6%); best-of-three: 79–89 (47.0%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on hard.

Peak season: 1994 — 19–15 (55.9%) from 34 matches. That year captures the ceiling of what Jonathan Stark can do on hard when performing at their best and represents the standard to aim for.