Marin Cilic and Zhizhen Zhang meet in the round of 32 at Seoul on Monday. Marin Cilic is searching for form, having lost 2 in a row (2 of the last 10). Zhizhen Zhang has won 2 of the last 10.

Hold strength tells the story — 76.4% versus 73.3% on first-serve points in Cilic's favor. The edge belongs to Cilic — real, but not the kind you take for granted at this level.