Glenn Michibata has found grass courts difficult, recording 9–16 across 25 matches (36.0%). 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 (Wimbledon): Glenn Michibata has struggled at Grand Slam level on grass: 3–6 (33.3%) in 9 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

By format on grass — best-of-five: 3–6 (33.3%); best-of-three: 6–10 (37.5%). Slightly stronger in three-set contests on grass, though the five-set record is still respectable.

Best season: 1984 — 2–3 (40.0%) from 5 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.