Victoria Azarenka and Roger Federer kept the No. 1 spot in the rankings released on Monday. Azarenka lost to Williams in the Olympics semifinals and settled for a bronze medal, while Federer lost to Murray in the men's final on Sunday.
The men's top seven remained the same, with Novak Djokovic second and Rafael Nadal third. Olympic bronze medalist Juan Martin del Potro moved up one spot to eighth.
Maria Sharapova, who lost in the final to Williams, rose to second from third, swapping spots with Agnieszka Radwanska.
