Soonwoo Kwon has found clay courts difficult, recording 9–12 across 21 matches (42.9%). 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): Soonwoo Kwon is 3–4 (42.9%) across 7 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

vs. Top 10 on clay: 0–3 (0.0%, 3 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: 6–8 (42.9%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Best season: 2021 — 5–4 (55.6%) from 9 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.