Martin Mulligan has an impressive clay court record of 110–48 across 158 matches (69.6% — strong). A win rate of that calibre over 158 matches is a reliable indicator of genuine quality on this surface. 6 titles on clay: Catania, Naples, Barcelona, Bastad-1, Munich, Kitzbuhel — a record that reflects consistent ability to close out tournaments on this surface.

At Grand Slam level (Roland Garros): a positive 6–3 (66.7%) across 9 matches — a player who generally rises to the occasion at the Slams on clay.

7 finals reached on clay — converted 6 into titles (outstanding 86% conversion rate). Converting finals at that rate separates champions from contenders. 14 semifinals. 25 quarterfinals.

By format on clay — best-of-five: 59–24 (71.1%); best-of-three: 51–24 (68.0%). Slightly better in five-set matches on clay — a positive sign for the Slams specifically.

Dominant season: 1968 — 45–6 (88.2%) from 51 matches. A campaign of 45 wins on clay in a single season is among the best single-season records the surface has seen — the clearest benchmark of what is achievable at peak level.

Martin Mulligan assembled a remarkable 15-match winning streak on clay — a run of that length goes far beyond form and into a different level of dominance on this surface.