Thursday's US Open round of 64 pits Qinwen Zheng against Yulia Putintseva on hard. Qinwen Zheng has won 4 of the last 10. Yulia Putintseva comes in at 5 wins from the last ten.

Zheng's 72% behind the first serve (against 60% for Putintseva) means break chances should be scarce in one direction. The edge belongs to Zheng — real, but not the kind you take for granted at this level.