Onny Parun holds a solid grass court record of 117–73 across 190 matches (61.6%). A winning majority across 190 matches shows consistent ability to get results on grass. Claimed 3 titles on grass: Auckland.

At Grand Slam level (Wimbledon): a positive 37–23 (61.7%) across 60 matches — a player who generally rises to the occasion at the Slams on grass.

7 finals reached on grass — won 3, lost 4 (43% conversion) — capable of reaching finals consistently, with room to improve at the decisive moment. 11 semifinals. 20 quarterfinals.

vs. Top 10 on grass: 0–9 (0.0%, 9 matches). Top 10 opponents have represented a clear ceiling on grass; addressing that deficit is the single biggest lever for improving the overall record here.

By format on grass — best-of-five: 72–41 (63.7%); best-of-three: 45–32 (58.4%). Slightly better in five-set matches on grass — a positive sign for the Slams specifically.

Best season: 1979 — 4–1 (80.0%) from 5 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.