Istvan Gulyas holds a solid clay court record of 49–40 across 89 matches (55.1%). A winning majority across 89 matches shows consistent ability to get results on clay. Istvan Gulyas has reached 2 finals without yet claiming a title on clay — one of the finest margins in tennis.

At Grand Slam level (Roland Garros): a positive 11–6 (64.7%) across 17 matches — a player who generally rises to the occasion at the Slams on clay.

2 finals reached on clay — 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. 11 quarterfinals.

By format on clay — best-of-five: 24–18 (57.1%); best-of-three: 25–22 (53.2%). Slightly better in five-set matches on clay — a positive sign for the Slams specifically.

Peak season: 1968 — 15–8 (65.2%) from 23 matches. That year captures the ceiling of what Istvan Gulyas can do on clay when performing at their best and represents the standard to aim for.