Roscoe Tanner holds a solid clay court record of 100–59 across 159 matches (62.9%). A winning majority across 159 matches shows consistent ability to get results on clay. Claimed 3 titles on clay: Cincinnati, Columbus-2, Tokyo.

At Grand Slam level (Roland Garros): a positive 13–6 (68.4%) across 19 matches — a player who generally rises to the occasion at the Slams on clay.

7 finals reached on clay — won 3, lost 4 (43% conversion) — capable of reaching finals consistently, with room to improve at the decisive moment. 10 semifinals. 14 quarterfinals.

vs. Top 10 on clay: 2–9 (18.2%, 11 matches). Top 10 opponents have represented a clear ceiling on clay; addressing that deficit is the single biggest lever for improving the overall record here.

By format on clay — best-of-five: 3–4 (42.9%); best-of-three: 97–55 (63.8%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Peak season: 1976 — 27–6 (81.8%) from 33 matches. That year captures the ceiling of what Roscoe Tanner can do on clay when performing at their best and represents the standard to aim for.