A spot in the next round is at stake on Saturday, when Katerina Siniakova goes up against Katie Boulter in the Osaka semifinal. Katerina Siniakova comes in at 5 wins from the last ten. Katie Boulter has won 5 of the last 10.

The underlying stats are tight across the board — this is a matchup decided by a handful of points. A tiebreak or two would surprise nobody, with Siniakova fractionally more likely to land the big points.