Sunday's French Open round of 16 pits Alexander Zverev against Jesper De Jong on clay. Alexander Zverev is rolling — 9 straight wins, 9 of 10 in recent play. Jesper De Jong is rolling — 4 straight wins, 4 of 10 in recent play.
Alexander Zverev leads the head-to-head 3-0, and history has a way of mattering in matchups like this one. On clay specifically it reads 3-0 Zverev — worth more than the overall number this week.
Alexander Zverev simply rates much higher on clay, and our number follows from it. Jong needs several things to break right at once; the percentages say they usually don't.