Jimmy Connors has been dominant on clay, posting 208–63 across 271 matches (76.8% — exceptional). Few players in the Open Era have sustained that level of dominance across a full career on clay. With 12 titles, among the most prolific clay court champions in the Open Era: Cincinnati, Indianapolis, Boca Raton, North Conway and 3 more.

At Grand Slam level (Roland Garros): Jimmy Connors has been outstanding — 59–15 (79.7%) across 74 matches. Winning more than 7 in 10 Grand Slam matches on clay is the benchmark of an all-time great on this surface.

22 finals reached on clay — won 12, lost 10 (solid 55% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers on clay. 30 semifinals. 40 quarterfinals.

vs. Top 10 on clay: 26–20 (56.5%, 46 matches). Winning above .500 against the world's best on clay is a benchmark of genuine elite quality on this surface.

By format on clay — best-of-five: 53–18 (74.6%); best-of-three: 155–45 (77.5%). Slightly stronger in three-set contests on clay, though the five-set record is still respectable.

Best season: 1978 — 13–1 (92.9%) from 14 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.

Jimmy Connors assembled a remarkable 20-match winning streak on clay — a run of that length goes far beyond form and into a different level of dominance on this surface.