Friday's Guayaquil quarterfinal pits Nick Hardt against Valerio Aboian on clay. Valerio Aboian comes in at 6 wins from the last ten. Nick Hardt comes in at 5 wins from the last ten.

There's a wide gap in our ratings on clay, and our number follows from it. Hardt comes in off a compressed schedule; Aboian comes in off a compressed schedule. A tiebreak or two would surprise nobody, with Aboian fractionally more likely to land the big points.