Byron Bertram has found clay courts difficult, recording 24–41 across 65 matches (36.9%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar.

At Grand Slam level (Roland Garros): Byron Bertram has struggled at Grand Slam level on clay: 2–6 (25.0%) in 8 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on clay — best-of-five: 2–9 (18.2%); best-of-three: 22–32 (40.7%). 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 — 15–16 (48.4%) from 31 matches. That year captures the ceiling of what Byron Bertram can do on clay when performing at their best and represents the standard to aim for.