London, July 7: Serena Williams survived a scare to book a Wimbledon semi-final showdown with old rival Maria Sharapova as the world number one battled back to defeat Victoria Azarenka 3-6, 6-2, 6-3 today.
Williams was in danger of a shock quarter-final exit after a slow start on Centre Court, but the five-time Wimbledon champion eventually battered 23rd seed Azarenka into submission in two hours and three minutes with a barrage of 43 winners and 14 aces.
The 33-year-old American, aiming to win her fourth successive Grand Slam title and 21st in total, will face world number four Sharapova on Thursday holding a 17-2 lead in their head to head record.
Serena has won all four of her semi-final meetings with Sharapova and defeated the Russian in their previous Wimbledon clash in the last 16 in 2010.
"It's been up and down. But somehow I'm still alive. I don't know how," said Serena, who famously lost to the teenage Sharapova in the 2004 Wimbledon final.
"Maria's been playing really well. I saw her match today. She's such a fighter and it's always good to see her doing well.
"We haven't played each other at Wimbledon in a while but I look forward to it. I just really don't have anything to lose."
After an awkward family reunion in the previous round when she defeated sister Venus in a subdued encounter, Serena was back to her usual shrieking and fist-pumping as she over-powered two-time Australian Open winner Azarenka, who has now lost 17 of their 20 meetings.
Serena's gritty fight-back extended her remarkable winning run at Grand Slams to 26 matches and her 2015 record to a blistering 37-1.
Despite her inconsistent display, Williams, who has won nine of her 11 Wimbledon quarter-finals, remains on course to hold all four major titles at once and is also in the hunt to clinch the calendar Grand Slam by a woman since Steffi Graf in 1988.
She will be heavily favoured to reach an eighth Wimbledon final given her dominance against Sharapova, who will need every trick up her sleeve to beat the American for the first time in 11 years.
Five-time Grand Slam winner Sharapova was forced to swat away claims of gamesmanship during her hard-fought 6-3, 6-7 (3/7), 6-2 last eight victory over Coco Vandeweghe.
She took two hours and 45 minutes before finally defeating unseeded Vandeweghe to reach her fifth Wimbledon semi-final and her first since 2011.