Tommy Haas holds a solid clay court record of 135–91 across 226 matches (59.7%). A winning majority across 226 matches shows consistent ability to get results on clay. Claimed 2 titles on clay: Houston, Munich.

At Grand Slam level (Roland Garros): a positive 21–13 (61.8%) across 34 matches — a player who generally rises to the occasion at the Slams on clay.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): a positive 36–32 (52.9%) across 68 matches — winning above .500 at this level, week in week out, is a genuine sign of quality on clay.

8 finals reached on clay — won 2, lost 6 (25% conversion) — capable of reaching finals consistently, with room to improve at the decisive moment. 12 semifinals. 24 quarterfinals.

vs. Top 10 on clay: 15–15 (50.0%, 30 matches). Competitive against the elite, but still narrowly below .500 — closing that gap would directly elevate the overall clay court profile.

By format on clay — best-of-five: 27–18 (60.0%); best-of-three: 108–73 (59.7%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Peak season: 2002 — 18–7 (72.0%) from 25 matches. That year captures the ceiling of what Tommy Haas can do on clay when performing at their best and represents the standard to aim for.