A spot in the next round is at stake on Friday, when Andrey Rublev goes up against Rinky Hijikata in the Hangzhou round of 16. Andrey Rublev has won 6 of the last 10. Rinky Hijikata is searching for form, having lost 2 in a row (4 of the last 10).

The serve is where this match separates: Rublev has been winning 74.2% of first-serve points to Hijikata's 68.6%, and on hard that gap compounds fast. Hijikata comes in off a compressed schedule. The edge belongs to Rublev — real, but not the kind you take for granted at this level.