Indian Wells: Serena Williams, Johanna Konta through at BNP Paribas Open
Serena Williams defeated former world number one Victoria Azarenka 7-5 6-3 to reach the third round at Indian Wells.
Williams, in her first tournament since a quarter-final exit at the Australian Open, needed more than two hours to get past her long-time rival.
"It's hard to play somebody you're so close to," Williams said. "It's also invigorating."
Britain's Johnanna Konta beat Taiwan's Hsieh Su-Wei 6-0 6-2 but Dan Evans lost 6-7 (4-7) 6-3 6-3 to Stan Wawrinka.
World number 45 Konta won the first eight games and saved three break points when serving at 3-2 in the second.
Her 33-year-old opponent, ranked 27, spurned 12 break-point opportunities in total.
World number four Sloane Stephens made 32 unforced errors as she lost 6-3 6-0 to Swiss qualifier Stefanie Vogele.
Vogele needed just over an hour to dispatch the fourth-seeded Stephens and push her overall record to 4-1 against the 2017 U.S. Open champion.
Williams, winner of 23 Grand Slam singles titles, will play Garbine Muguruza in the third round after the 20th-seeded Spaniard beat American Lauren Davis 6-1 6-3.
Evans out after Wawrinka battle
British number three Evans was beaten by three-time Grand Slam champion Wawrinka in their first-round match at Indian Wells.
Evans, 28, back inside the world's top 100 after a drugs ban, saved three set points before taking the opening set.
World number 40 Wawrinka levelled and broke in the eighth game of the decider to win in two hours and eight minutes.
There were four successive breaks in the first set before the Briton took command of the tie-break and raced 6-1 ahead.
In blustery Californian conditions, 2017 finalist Wawrinka lost only four points on his serve in taking the second set in only 31 minutes, firing 16 winners.
Evans, who required a medical time-out for treatment on his toe before the deciding set, saw three break point chances elude him in the fifth game and three more in the seventh.
It was the pair's first meeting since an epic 2016 US Open third-round match which Wawrinka won in five sets.