PARIS—Despite her extended run of success over the past four years, world No. 1 Serena Williams remains surprised at her consistency. After missing nearly an entire year between 2010 and 2011 due to ...

Even through the third, when Azarenka was at her best and in the lead, most of the points shown in this clip are of Serena’s winning shots. Power and speed, offense and defense, in equal measures: ...