John Alexander holds a solid clay court record of 225–132 across 357 matches (63.0%). A winning majority across 357 matches shows consistent ability to get results on clay. Claimed 2 titles on clay: North Conway, Louisville.

At Grand Slam level (Roland Garros): John Alexander is 16–13 (55.2%) across 29 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

10 finals reached on clay — won 2, lost 8 (20% conversion) — capable of reaching finals consistently, with room to improve at the decisive moment. 22 semifinals. 46 quarterfinals.

vs. Top 10 on clay: 12–28 (30.0%, 40 matches). Top 10 opponents have represented a clear ceiling on clay; addressing that deficit is the single biggest lever for improving the overall record here.

By format on clay — best-of-five: 27–25 (51.9%); best-of-three: 198–107 (64.9%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on clay.

Peak season: 1979 — 26–8 (76.5%) from 34 matches. That year captures the ceiling of what John Alexander can do on clay when performing at their best and represents the standard to aim for.