Agustin Calleri has a competitive hard court record of 66–79 across 145 matches (45.5%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. Agustin Calleri has reached 1 final without yet claiming a title on hard — one of the finest margins in tennis.

At Grand Slam level (Australian Open & US Open): Agustin Calleri has struggled at Grand Slam level on hard: 10–17 (37.0%) in 27 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): Agustin Calleri is 23–24 (48.9%) across 47 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole hard swing.

One final reached on hard, without converting it into a title. That final-round experience is valuable groundwork for going one step further next time. 4 semifinals. 10 quarterfinals.

vs. Top 10 on hard: 4–16 (20.0%, 20 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: 11–17 (39.3%); best-of-three: 55–62 (47.0%). Slightly stronger in three-set contests on hard, though the five-set record is still respectable.

Best season: 2004 — 11–8 (57.9%) from 19 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.