Tom Okker has been dominant on grass, posting 111–36 across 147 matches (75.5% — exceptional). Few players in the Open Era have sustained that level of dominance across a full career on grass. 4 titles on grass: Dublin, Newport, Leicester, Nottingham — a record that reflects consistent ability to close out tournaments on this surface.

At Grand Slam level (Wimbledon): Tom Okker has been outstanding — 61–21 (74.4%) across 82 matches. Winning more than 7 in 10 Grand Slam matches on grass is the benchmark of an all-time great on this surface.

6 finals reached on grass — won 4, lost 2 (solid 67% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on grass. 10 semifinals. 19 quarterfinals.

vs. Top 10 on grass: 1–7 (12.5%, 8 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: 66–24 (73.3%); best-of-three: 45–12 (78.9%). Slightly stronger in three-set contests on grass, though the five-set record is still respectable.

Best season: 1975 — 10–1 (90.9%) from 11 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.

Tom Okker put together an impressive 12-match winning streak on grass, highlighting the ability to maintain high performance across multiple tournament rounds and events.