Thursday's Antofagasta round of 16 pits Eduardo Ribeiro against Gustavo Heide on clay. Gustavo Heide has won 8 of the last 10. Eduardo Ribeiro has won 4 of the last 10.
Hold strength tells the story — 71.7% versus 64.2% on first-serve points in Heide's favor. If Heide plays anywhere close to a normal level, this ends in relatively comfortable fashion.