Simona halep will need to win the Western & Southern Open to usurp the Czech and become the 24th woman in WTA history to reach WTA World No.1.

CINCINNATI, OH, USA
Simona Halep edged ahead of the currently top-ranked Karolina Pliskova in the battle for supremacy on the WTA rankings, but the Romanian will need to win the Western & Southern Open to usurp the Czech and become the 24th woman in WTA history to reach WTA World No.1.