• Maria Sharapova plays a backhand in her quarter final match against Serena Williams during the 2016 Australian Open.

Maria Sharapova plays a backhand in her quarter final match against Serena Williams during the 2016 Australian Open. (Photo : Getty Images/Quinn Rooney)

Former world's no.1 Maria Sharapova continues her preparation for a comeback run next season, as the latest video posted on Instagram showed the Russian star in the middle of her intense training.

Sharapova was in Las Vegas last Monday to attend a WTT Smash Hits charity event organized by Elton John and tennis legend Billie Jean King. After taking a couple of days off, the five-time Grand Slam winner was back in court on Saturday to keep her in shape for her comeback tour in 2017 - Check Video

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The Court of Arbitration for Sports decided to reduce the two-year ban imposed on Sharapova by 9 months, allowing the Russian to resume her pro tennis career in April next year.  

Per report by ESPN:

"That was the ruling of the Court of Arbitration for Sport on Tuesday (Oct/ 4) after hearing an appeal from Sharapova in September over her two-year doping ban. The court reduced the Russian tennis star's suspension to 15 months after determining that she acted with "no significant fault."

-Meanwhile, Serena Williams was spotted partying with Taylor Swift, Cara Delevingne and Dakota Johnson at Eliot Summer's concert at Bowery Ballroom in New York City - Check for Photos.

Williams has been out of the WTA circuit since her semifinal defeat at the US Open, eventually losing her no.1 ranking to Angelique Kerber. The 22-time Grand Slam winner withdrew her participation from Wuhan and China Open due to a knee injury.

While Serena seems to be okay based on the photo, it's still unknown whether she will compete in the season-ending WTA Tour Finals in Singapore on Oct. 23 to 30.