A spot in the next round is at stake on Saturday, when Arthur Fils goes up against Flavio Cobolli in the Cincinnati semifinal. Arthur Fils is rolling — 3 straight wins, 7 of 10 in recent play. Flavio Cobolli is rolling — 4 straight wins, 7 of 10 in recent play.

The serve is where this match separates: Fils has been winning 74.2% of first-serve points to Cobolli's 71%, and on hard that gap compounds fast. Fils should have enough here, though Cobolli has the tools to make the scoreboard uncomfortable.