The Curitiba title is on the line on Sunday, when Gustavo Heide meets Ivan Justo Guido. Gustavo Heide is rolling — 5 straight wins, 8 of 10 in recent play. Ivan Justo Guido has won 4 in a row and 7 of the last 10 overall.

The serve is where this match separates: Heide has been winning 71.6% of first-serve points to Guido's 63.2%, and on clay that gap compounds fast. Heide comes in off a compressed schedule; Guido comes in off a compressed schedule. The edge belongs to Heide — real, but not the kind you take for granted at this level.