A spot in the next round is at stake on Saturday, when Gustavo Heide goes up against Pedro Boscardin Dias in the Curitiba semifinal. Gustavo Heide has won 4 in a row and 8 of the last 10 overall. Pedro Boscardin Dias has won 3 in a row and 6 of the last 10 overall.

Heide's 71.6% behind the first serve (against 65.5% for Dias) means break chances should be scarce in one direction. Heide comes in off a compressed schedule; Dias comes in off a compressed schedule. Dias needs several things to break right at once; the percentages say they usually don't.