Mark Keil has found the Tour difficult, recording 4–8 across 12 matches (33.3%). The numbers point to a player still building their Tour presence — a key area of opportunity going forward.
At Grand Slam level (Australian Open, Roland Garros, Wimbledon, US Open): Mark Keil has struggled at Grand Slam level: 1–3 (25.0%) in 4 matches. The best-of-five format and elite fields make this the toughest benchmark on Tour.
By format — best-of-five: 1–3 (25.0%); best-of-three: 3–5 (37.5%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance.
Best season: 1991 — 3–3 (50.0%) from 6 matches. The best single-season display to date — a useful reference point as the career continues to develop.