Daniel Merida Aguilar and Roman Andres Burruchaga meet in the semifinal at Umag on Friday. Daniel Merida Aguilar comes in at 5 wins from the last ten. Roman Andres Burruchaga comes in at 3 wins from the last ten.

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

There's a wide gap in our ratings on clay, and our number follows from it. Aguilar comes in off a compressed schedule; Burruchaga arrives with very little recovery time. Little separates them; Aguilar gets the nod on the finest of margins.