- Tag results for Indian_Wells
Elena Vesnina capped a stellar Indian Wells campaign with a hard-fought 6-7 (6/8), 7-5, 6-4 triumph over fellow Russian Svetlana Kuznetsova.
Federer, sidelined some six months after knee surgery last year, returned to win his 18th Grand Slam title at the Australian Open in January.
US Open champion Wawrinka, past the quarter-finals in the California desert for the first time, knocked out Spain's Pablo Carreno Busta 6-3, 6-2.
Roger Federer's fans were treated to his dubious talents in the music department as he posted a video on Facebook.
Sock notched his first victory over a top-five player and reached the semi-finals of an elite event for the first time.
Seven-time Grand Slam champion Venus Williams slumped to a three-set defeat at the hands of Russian Elena Vesnina.
Although Nadal owns a 23-13 lead in their series, Federer has won the past three in a row, including an epic comeback in the Australian Open final.
Sania Mirza and Barbara Strycova crashed out of the BNP Paribas Open after going down in straight sets in the quarters.
Russia's Elena Vesnina, the 14th seed, notched her first career victory over a top-three player.
Three-time champion Rafael Nadal sailed safely through to the third round of the ATP Indian Wells Masters.
Indian tennis ace Sania Mirza and her doubles partner Barbora Strycova of Czech Republic on Sunday defeated Italy’s Sara Errani and Alicja Rosolka of Poland.
Leander Paes and his Argentine partner Juan Martin de Porto crashed out in the opening round of the men's doubles event.
US teenager Kayla Day shocked Mirjana Lucic-Baroni at Indian Wells to earn a clash with French Open champion Garbine Muguruza.
A statement issued by BNP Paribas Open organisers in California quoted Williams as saying she was withdrawing because of a problem with her left knee.
Serena Williams, a finalist last year, will play for the third straight year after boycotting the event for several years.