Grega Zemlja has a competitive clay court record of 14–14 across 28 matches (50.0%). The record shows a player capable of competing here, though there is clear room to push the win rate higher.

At Grand Slam level (Roland Garros): Grega Zemlja is 2–2 (50.0%) across 4 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

By format on clay — best-of-five: 7–7 (50.0%); best-of-three: 7–7 (50.0%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Best season: 2013 — 5–5 (50.0%) from 10 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.