Nicola Spear has found clay courts difficult, recording 80–115 across 195 matches (41.0%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Nicola Spear has reached 2 finals without yet claiming a title on clay — one of the finest margins in tennis.

At Grand Slam level (Roland Garros): Nicola Spear has struggled at Grand Slam level on clay: 7–13 (35.0%) in 20 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

2 finals reached on clay — none converted into a title yet. Reaching 2 finals is a mark of real quality, but the gap between finalist and champion is one of the finest lines in the sport. 4 semifinals. 12 quarterfinals.

vs. Top 10 on clay: 0–9 (0.0%, 9 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: 12–21 (36.4%); best-of-three: 68–94 (42.0%). Slightly stronger in three-set contests on clay, though the five-set record is still respectable.

Peak season: 1970 — 22–14 (61.1%) from 36 matches. That year captures the ceiling of what Nicola Spear can do on clay when performing at their best and represents the standard to aim for.