Ons Jabeur of Tunisia made easy work of Elina Svitolina 6-4 6-2 to reach the semi-finals at the Chicago Fall Tennis Classic on Friday.
Jabeur had never beaten Svitolina, who won the Chicago Women’s Open back in August.
The Tunisian converted four of 13 break points and saved 11 of the 12 break points she faced to reach the last four, completing the match in 82 minutes.
Svitolina had just nine winners during a match Jabeur controlled.
Jabeur will face fifth-seeded Elena Rybakina of Kazakhstan, who was leading 6-4, 3-1 when third-seeded Belinda Bencic of Switzerland retired with a right knee injury.