A spot in the next round is at stake on Tuesday, when Felipe Meligeni Alves goes up against Juan Pablo Varillas in the Antofagasta round of 32. Juan Pablo Varillas has won 7 of the last 10. Felipe Meligeni Alves comes in at 4 wins from the last ten.

On paper it's close: comparable ratings, comparable serve numbers, small margins everywhere. Little separates them; Varillas gets the nod on the finest of margins.