Sunday's Montreal round of 16 pits Daniel Merida Aguilar against Tallon Griekspoor on hard. Tallon Griekspoor has won 3 in a row and 4 of the last 10 overall. Daniel Merida Aguilar is rolling — 3 straight wins, 8 of 10 in recent play.

Griekspoor's 73.2% behind the first serve (against 63.9% for Aguilar) means break chances should be scarce in one direction. Little separates them; Griekspoor gets the nod on the finest of margins.