Mitchell Krueger and Stefan Kozlov meet in the round of 16 at Columbus on Thursday. Mitchell Krueger has won 6 of the last 10. Stefan Kozlov has won 3 of the last 10.

The serve is where this match separates: Krueger has been winning 68.6% of first-serve points to Kozlov's 65.5%, and on hard that gap compounds fast. Little separates them; Krueger gets the nod on the finest of margins.