The Round of 32 is underway at the National Bank Open in Toronto, where the WTA 1000 hard-court field is being whittled down. Saturday's featured matchup brings a rematch between two players with a well-documented head-to-head history, making it one of the more intriguing contests of the round.

Jessica Pegula vs. Katerina Siniakova - Round of 32

Pegula and Siniakova have met seven times overall, with Pegula holding a commanding 6-1 advantage in the head-to-head series. Their five most recent meetings tell a largely consistent story: Pegula has won four of those five encounters, with Siniakova's lone victory coming in a three-set battle at the Bad Homburg Open. Pegula has shown the ability to close out matches efficiently against Siniakova, winning several of those matchups in straight sets, including a 6-3 6-2 result and a 6-2 6-3 result in recent meetings. Siniakova's single win in the recent sample did come in three sets, suggesting she is capable of extending Pegula when the match stretches deep, but the overall record heavily favors the fourth-ranked American.

Prediction: Pegula, backed by a 6-1 head-to-head record and four wins in the last five meetings, is the strong favorite to advance.