Azarenka's 32-week reign at No. 1 is the 11th longest since the rankings began in November 1975. She's seven weeks away from tying Amelie Mauresmo for 10th on the all-time list. Caroline Wozniacki is ninth at 67 weeks.
Azarenka is among nine Top 10 players -- all but No. 4 Serena Williams, who withdrew due to a case of the flu -- in the draw this week at the China Open. Third-ranked Agnieszka Radwanska is the defending champion.
Azarenka, who only played two tournaments after Beijing last year and so isn't protecting a lot of ranking points, has a 1,660-point lead over No. 2-ranked Maria Sharapova. Azarenka totals 10,095 points.
Radwanska is third with 8,015 and Williams sits in fourth at 7,900. Petra Kvitova remains fifth at 6,520 while Angelique Kerber has 5,350 points for sixth. Sara Errani, who retired from her first-round match in Beijing due to injury, is seventh with 4,855 points.
Li Na comes in eighth at 4,605 while ninth-ranked Samantha Stosur isn't far behind with 4,475 points. Marion Bartoli (3,700) completes the Top 10.
Nadia Petrova came though a packed field at the Toray Pan Pacific Open in Tokyo last week and won her third WTA title. That improves her ranking four places to No. 14.