Azarenka withdraws due to injury, Stephens rolls on

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A wrist injury forced top seed Victoria Azarenka to pull out of her second-round match against Dominika Cibulkova at the Abierto Mexicano Telcel on Wednesday.

Azarenka was coming off a gruelling three-set win over Polona Hercog in her first match since losing to eventual champion Angelique Kerber in the quarter-finals of last month's Australian Open.

The world number 14's withdrawal due to a left wrist injury handed 2014 champion Cibulkova a walkover and spot in the quarters of the WTA tournament in Acapulco.

"I don't want to have a setback," Azarenka said. "Done it too many times before.

"It didn't get me better. Trying to listen to my body, be smarter."

Next up for Cibulkova is sixth-seeded Swede Johanna Larsson, who overcame Shelby Rogers 6-1 6-7 (2-7) 7-5.

Sloane Stephens - the second seed - continued her good form with a comfortable straight-sets win over Olga Govortsova.

Stephens accounted for Govortsova 6-4 6-1 to reach the last eight, taking her win-loss record in 2016 to 8-1, which includes the ASB Classic title.

The American's only defeat this year came at the Australian Open, where she was eliminated in the first round.

Stephens' victory earned her a showdown with Japanese wildcard Naomi Osaka, who downed Mariana Duque-Marino 6-3 7-6 (7-5).

Russian third seed Anastasia Pavlyuchenkova also booked a quarter-final berth via a 6-2 6-1 win against Julia Glushko.

Pavlyuchenkova will now meet eighth seed Yanina Wickmayer, who prevailed 3-6 6-3 6-3 against Monica Puig.

Johanna Konta was not so fortunate, the fourth seed and Australian Open semi-finalist stunned 4-6 6-2 7-5 by Mirjana Lucic-Baroni.

Awaiting Lucic-Baroni in the quarters is Christina McHale, who rallied to beat seventh seed Danka Kovinic 3-6 6-3 6-2.