John Marks has found the Tour difficult, recording 29–80 across 109 matches (26.6%). The numbers point to a player still building their Tour presence — a key area of opportunity going forward. John Marks has reached 2 finals without yet claiming a title — one of the finest margins in tennis.
At Grand Slam level (Australian Open, Roland Garros, Wimbledon, US Open): John Marks has struggled at Grand Slam level: 7–13 (35.0%) in 20 matches. The best-of-five format and elite fields make this the toughest benchmark on Tour.
2 finals reached — none converted into a title yet. Reaching 2 finals is a mark of real quality, but the gap between finalist and champion is one of the finest lines in the sport. 2 semifinals. 3 quarterfinals.
vs. Top 10: 1–4 (20.0%, 5 matches). Top 10 opponents have represented a clear ceiling; addressing that deficit is the single biggest lever for improving the overall record.
By format — best-of-five: 7–13 (35.0%); best-of-three: 22–67 (24.7%). Significantly better in five-set matches — a strong physical profile that tends to tell as matches and tournaments progress.
Best season: 1978 — 9–16 (36.0%) from 25 matches. The best single-season display to date — a useful reference point as the career continues to develop.
