Sjeng Schalken has a competitive clay court record of 66–75 across 141 matches (46.8%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. Claimed 1 title on clay: Valencia.

At Grand Slam level (Roland Garros): Sjeng Schalken is 8–8 (50.0%) across 16 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): Sjeng Schalken is 18–24 (42.9%) across 42 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole clay swing.

One final reached on clay, converted into a title — a perfect finals record on this surface. 3 semifinals. 13 quarterfinals.

vs. Top 10 on clay: 3–9 (25.0%, 12 matches). Top 10 opponents have represented a clear ceiling on clay; addressing that deficit is the single biggest lever for improving the overall record here.

By format on clay — best-of-five: 12–14 (46.2%); best-of-three: 54–61 (47.0%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Best season: 1995 — 14–8 (63.6%) from 22 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.