Marin Cilic has an impressive grass court record of 83–33 across 116 matches (71.6% — strong). A win rate of that calibre over 116 matches is a reliable indicator of genuine quality on this surface. Claimed 3 titles on grass: Queen's Club, Stuttgart.

At Grand Slam level (Wimbledon): a positive 34–14 (70.8%) across 48 matches — a player who generally rises to the occasion at the Slams on grass.

6 finals reached on grass — won 3, lost 3 (solid 50% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on grass. 11 semifinals. 16 quarterfinals.

vs. Top 10 on grass: 4–10 (28.6%, 14 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: 34–15 (69.4%); best-of-three: 49–18 (73.1%). Slightly stronger in three-set contests on grass, though the five-set record is still respectable.

Best season: 2018 — 6–1 (85.7%) from 7 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.