Yen-Hsun Lu has found hard courts difficult, recording 125–172 across 297 matches (42.1%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar. Yen-Hsun Lu has reached 1 final without yet claiming a title on hard — one of the finest margins in tennis.

At Grand Slam level (Australian Open & US Open): Yen-Hsun Lu has struggled at Grand Slam level on hard: 10–25 (28.6%) in 35 matches. The best-of-five format and elite fields make this the toughest benchmark on this surface.

ATP Masters 1000 on hard (Indian Wells, Miami, Canada, Cincinnati, Shanghai, Paris): Yen-Hsun Lu is 25–39 (39.1%) across 64 Masters matches — below .500 in the Tour's deepest fields. Lifting that record here would unlock better results across the whole hard swing.

One final reached on hard, without converting it into a title. That final-round experience is valuable groundwork for going one step further next time. 3 semifinals. 16 quarterfinals.

vs. Top 10 on hard: 4–21 (16.0%, 25 matches). Top 10 opponents have represented a clear ceiling on hard; addressing that deficit is the single biggest lever for improving the overall record here.

By format on hard — best-of-five: 23–29 (44.2%); best-of-three: 102–143 (41.6%). Slightly better in five-set matches on hard — a positive sign for the Slams specifically.

Peak season: 2014 — 20–16 (55.6%) from 36 matches. That year captures the ceiling of what Yen-Hsun Lu can do on hard when performing at their best and represents the standard to aim for.