Juan Albert Viloca-Puig has found clay courts difficult, recording 42–52 across 94 matches (44.7%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Juan Albert Viloca-Puig has reached 2 finals without yet claiming a title on clay — one of the finest margins in tennis.

At Grand Slam level (Roland Garros): Juan Albert Viloca-Puig 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.

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. 4 semifinals. 7 quarterfinals.

vs. Top 10 on clay: 2–3 (40.0%, 5 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: 2–3 (40.0%); best-of-three: 40–49 (44.9%). Slightly stronger in three-set contests on clay, though the five-set record is still respectable.

Best season: 2001 — 3–2 (60.0%) from 5 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.