Serena advances, Venus fails

Serena Williams advanced to the third round of the BNP Paribas Open following a routine win while her sister Venus was knocked out on Friday.

The world number one needed just 62 minutes on the hard courts of Indian Wells to defeat Germany's Lara Siegemund 6-2, 6-1. 

Williams faced just three break points in the encounter and two breaks of serve in each set were enough to see her over the line.

>"My intensity was the key," the 33-year-old said in her post-match interview. 

"She actually started out really strong in that first game when I was serving, she was close to breaking me.

"I knew right then and there if I wasn't going to come out at 100% it would be a long match."

Waiting for the American in the third round is Yaroslava Putintseva, who upset 24th seed Kristina Mladenovic 6-4, 6-4 earlier in the day.

Meanwhile, Japanese qualifier Kurumi Nara ended Venus' run in Florida with the biggest victory of her career. Nara held on to beat the tenth seed 6-4, 6-3 during the rain-affected match.

It was the end of an emotional return for the Williams sisters, who last played together at the Florida event 15 years ago.

In other results, fifth seed Simona Halep breezed past Vania King 6-1, 6-1 while Yaroslava Shvedova upset 11th seed Lucie Safarova 6-3, 6-4.