Cliff Letcher has found grass courts difficult, recording 41–51 across 92 matches (44.6%). 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 (Wimbledon): Cliff Letcher is 13–16 (44.8%) across 29 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

2 semifinals on grass without yet reaching a final — consistent deep runs that show the ability to string together wins across a full draw, with the step to the final still to come. 3 quarterfinals adds further depth to that picture.

By format on grass — best-of-five: 14–21 (40.0%); best-of-three: 27–30 (47.4%). Slightly stronger in three-set contests on grass, though the five-set record is still respectable.

Best season: 1973 — 7–4 (63.6%) from 11 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.