Igor Sijsling has found the Tour difficult, recording 50–90 across 140 matches (35.7%). The numbers point to a player still building their Tour presence — a key area of opportunity going forward.
At Grand Slam level (Australian Open, Roland Garros, Wimbledon, US Open): Igor Sijsling has struggled at Grand Slam level: 5–16 (23.8%) in 21 matches. The best-of-five format and elite fields make this the toughest benchmark on Tour.
ATP Masters 1000 (Indian Wells, Miami, Monte Carlo, Madrid, Rome, Canada, Cincinnati, Shanghai, Paris): Igor Sijsling has struggled at Masters level: 5–10 (33.3%) in 15 matches. Improving at this level is the clearest path to a stronger overall record.
vs. Top 10: 1–10 (9.1%, 11 matches). Top 10 opponents have represented a clear ceiling; addressing that deficit is the single biggest lever for improving the overall record.
By format — best-of-five: 6–18 (25.0%); best-of-three: 44–72 (37.9%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance.
Peak season: 2013 — 20–25 (44.4%) from 45 matches. That year captures the ceiling of what Igor Sijsling can do when performing at their best and represents the standard to aim for.