Mexican Open News
Nadal will have the chance to claim the top spot back on Monday if he wins his third title in Acapulco and Djokovic fails to reach the semi-finals of the Dubai Tennis Championships.
After falling behind 2-0 at the start, Azarenka reeled off six straight games and ultimately made quick work of Vera Lapko on a windy day in the California desert.
Next up for Kyrgios is either big-serving American John Isner or his eighth seeded countryman John Millman, who play later on Friday.
Battle-scarred Argentine Juan Martin del Potro clinched his 21st career title with a 6-4 6-4 win over Kevin Anderson in the Mexican Open final in Acapulco on Sunday.
Anderson won the New York Open crown two weeks ago.
World number two Rafael Nadal pulled out of the Mexican Open on Tuesday, cutting short his comeback from a hip injury when the problem flared up again, he told a press conference.
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