Monday's French Open first round pits Adrian Mannarino against Ugo Humbert on clay. Ugo Humbert comes in at 6 wins from the last ten. Adrian Mannarino is searching for form, having lost 6 in a row (1 of the last 10).

Adrian Mannarino has had the better of this rivalry, winning 3 of 5 against Ugo Humbert. On clay specifically it reads 2-0 Humbert — worth more than the overall number this week.

Ugo Humbert simply rates much higher on clay, and our number follows from it. Mannarino needs several things to break right at once; the percentages say they usually don't.