A spot in the next round is at stake on Wednesday, when Gustavo Heide goes up against Juan Pablo Varillas in the Cali round of 16. Gustavo Heide is 7-3 across recent matches. Juan Pablo Varillas is 7-3 across recent matches.

The serve is where this match separates: Heide has been winning 71.6% of first-serve points to Varillas's 68.5%, and on clay that gap compounds fast. Heide comes in off a compressed schedule. The edge belongs to Heide — real, but not the kind you take for granted at this level.