Saturday's Hertogenbosch semifinal pits Jesper De Jong against Shintaro Mochizuki on grass. Jesper De Jong is 4-6 across recent matches. Shintaro Mochizuki is searching for form, having lost 7 in a row (2 of the last 10).

The two have never played — a first meeting always adds a layer of uncertainty the numbers can't fully capture.

The serve is where this match separates: Jong has been winning 71.8% of first-serve points to Mochizuki's 67%, and on grass that gap compounds fast. Little separates them; Jong gets the nod on the finest of margins.