In other matches, Sharapova beat Svitolina, Vinci upset Radwanska, and Simona Halep advanced.
With some 40 players standing behind her, she then watched as highlights of her biggest tennis moments played on the stadium's giant screens.
Stephane Vivier worked with the 17-time Grand Slam champion for the past five years.
The Japanese wild card, ranked No. 103, upset the world No. 4, 7-5, 6-2.
Williams stormed back from an early deficit against Silvia Soler-Espinosa to win 7-5, 6-2.
Why is breakout star Nick Kyrgios calling it a season in September?
Recapping the winners and losers from the week that was in pro tennis.
Nine of the Top 10, including Rafa, Nole, and Cilic, are in action in Asia.
Looking ahead at the year's fully-loaded final Premier Mandatory event, in Beijing.