Peter Rennert holds a solid grass court record of 22–17 across 39 matches (56.4%). A winning majority across 39 matches shows consistent ability to get results on grass.

At Grand Slam level (Wimbledon): a positive 10–7 (58.8%) across 17 matches — a player who generally rises to the occasion at the Slams on grass.

4 quarterfinals on grass — regularly reaching that stage is a solid baseline, with the next step being to break through to the final rounds more often.

By format on grass — best-of-five: 10–6 (62.5%); best-of-three: 12–11 (52.2%). Significantly better in five-set matches — a strong physical profile on grass that tends to tell as matches and tournaments progress.

Best season: 1980 — 9–5 (64.3%) from 14 matches. The best single-season display to date — a useful reference point as the grass record continues to develop.