Tuesday's US Open round of 16 pits Alexander Zverev against Luciano Darderi on hard. Alexander Zverev has won 7 of the last 10. Luciano Darderi is rolling — 3 straight wins, 6 of 10 in recent play.

Hold strength tells the story — 73.7% versus 69.8% on first-serve points in Zverev's favor. Anything other than a Zverev win would rank among the bigger surprises of the week.