Wednesday's Curitiba round of 16 pits Joao Lucas Reis Da Silva against Matheus Pucinelli De Almeida on clay. Matheus Pucinelli De Almeida has won 5 of the last 10. Joao Lucas Reis Da Silva has won 5 of the last 10.

On paper it's close: comparable ratings, comparable serve numbers, small margins everywhere. Silva comes in off a compressed schedule; Almeida comes in off a compressed schedule. Little separates them; Almeida gets the nod on the finest of margins.