Chang-Rung Wu has a competitive hard court record of 13–11 across 24 matches (54.2%). The record shows a player capable of competing here, though there is clear room to push the win rate higher.

By format on hard — best-of-five: 8–9 (47.1%); best-of-three: 5–2 (71.4%). Markedly stronger in three-set formats; the win rate drops noticeably in five-setters, which has direct implications for Grand Slam performance on hard.

Chang-Rung Wu recorded a notable 7-match winning streak on hard — a run that demonstrates consistency across consecutive draws on this surface.