Stefan Koubek has a competitive career record of 215–253 across 468 matches (45.9%). The record shows a player capable of competing at Tour level, though there is clear room to push the win rate higher. Claimed 3 titles: Atlanta, Delray Beach, Doha.
At Grand Slam level (Australian Open, Roland Garros, Wimbledon, US Open): Stefan Koubek is 31–38 (44.9%) across 69 Grand Slam matches — below .500, though the elite draw depth makes that a notoriously difficult barrier.
ATP Masters 1000 (Indian Wells, Miami, Monte Carlo, Madrid, Rome, Canada, Cincinnati, Shanghai, Paris): Stefan Koubek has struggled at Masters level: 19–38 (33.3%) in 57 matches. Improving at this level is the clearest path to a stronger overall record.
6 finals reached — won 3, lost 3 (solid 50% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers. 13 semifinals. 35 quarterfinals.
vs. Top 10: 8–34 (19.0%, 42 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: 46–54 (46.0%); best-of-three: 169–199 (45.9%). Consistent regardless of format — a sign of a well-rounded game that holds up as matches develop.
Peak season: 1999 — 32–26 (55.2%) from 58 matches. That year captures the ceiling of what Stefan Koubek can do when performing at their best and represents the standard to aim for.
