Clark Graebner holds a solid hard court record of 91–51 across 142 matches (64.1%). A winning majority across 142 matches shows consistent ability to get results on hard. Claimed 3 titles on hard: Buffalo, Sacramento.

9 finals reached on hard — won 3, lost 6 (33% conversion) — capable of reaching finals consistently, with room to improve at the decisive moment. 18 semifinals. 28 quarterfinals.

By format on hard — best-of-five: 15–8 (65.2%); best-of-three: 76–42 (64.4%). Consistent regardless of format on hard — a sign of a well-rounded game that holds up as matches develop.

Best season: 1969 — 13–2 (86.7%) from 15 matches. The best single-season display to date — a useful reference point as the hard record continues to develop.

Clark Graebner put together an impressive 12-match winning streak on hard, highlighting the ability to maintain high performance across multiple tournament rounds and events.