Ivanovic reaches last eight
Ana Ivanovic needed just over an hour to see beat Aleksandra Wozniak and claim her spot in the quarter-finals of the Monterrey Open.
The former world number one and 2008 French Open champion brushed aside the Canadian 6-4 6-2 to set up a showdown with sixth seed Magdalena Rybarikova in the last eight.
Rybarikova had won the first set of her second-round match 6-4 against Ayumi Morita when the Japanese was forced to retire after suffering from dizziness.
The other seed in action, number eight Monica Puig, also had few problems as she defeated Nicole Gibbs 6-4 6-2 while joining them in the last eight was qualifier Julia Boserup, who beat fellow American Alexandra Kiick 2-6 6-2 6-1.