Coco Gauff and Elena Rybakina meet in the semifinal at US Open on Friday. Elena Rybakina has won 9 in a row and 9 of the last 10 overall. Coco Gauff is rolling — 10 straight wins, 10 of 10 in recent play.

The serve is where this match separates: Rybakina has been winning 70% of first-serve points to Gauff's 65.8%, and on hard that gap compounds fast. Rybakina should have enough here, though Gauff has the tools to make the scoreboard uncomfortable.