John Cooper has a competitive career record of 88–77 across 165 matches (53.3%). The record shows a player capable of competing at Tour level, though there is clear room to push the win rate higher. Claimed 1 title: Hilversum.
At Grand Slam level (Australian Open, Roland Garros, Wimbledon, US Open): John Cooper is 16–14 (53.3%) across 30 Grand Slam matches — below .500, though the elite draw depth makes that a notoriously difficult barrier.
2 finals reached — won 1, lost 1 (solid 50% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers. 3 semifinals. 15 quarterfinals.
By format — best-of-five: 36–30 (54.5%); best-of-three: 52–47 (52.5%). Slightly better in five-set matches — a positive sign for Grand Slam campaigns specifically.
Peak season: 1971 — 27–21 (56.3%) from 48 matches. That year captures the ceiling of what John Cooper can do when performing at their best and represents the standard to aim for.