• Maria Sharapova, Serena William

Maria Sharapova, Serena William (Photo : Instagram/Splash Online News)

Maria Sharapova and Serena Williams have been 'bitter rivals' on the tennis court for almost the entirety of their careers. That status quo won't change at all even off the court as the two tennis divas face off in a sort of bikini showdown while taking their vacation.

Sharapova still found her way into the news without swinging a racket after the Russian Diva posted a series of photos on her Instagram account, showing to everybody why she's one of the hottest celebrity athletes on the planet.

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Sharapova, who is believed having her vacation somewhere in Montenegro before she hits back to training for the US Open championship, has never denied being conscious about her body figure.

In an interview with Style.uk, the Tennis star shared the secrets behind her killer curves and conditioning that kept her at the top of her game.

"I started playing tennis when I was four, so it's always been part of my life, but my training regime gets more intense when I'm preparing for a tournament," Sharapova said.

"I love cold-pressed juices and, when I'm home, I try to make all sorts of green juices to get vitamins," she added. "When I'm flying, I'll avoid bread or anything with too much protein and will make sure I eat lots of vitamin C infused foods, but there's no real secret to fighting jet lag unfortunately."

Meanwhile somewhere in South Beach, Williams was also enjoying her vacation on the beach, and as expected, she posted her own set of bikini pictures on her social media account.

Williams is coming off another victorious campaign at Wimbledon, winning her 21st career Grand Slam after beating Spain's Garbiñe Muguruza 6-4, 6-4 in very competitive finals match at All-England club. Before punching her spot in the championship match, Williams blasted Maria Sharapova 6-2, 6-4 in their semifinal encounter to extend her winning streak against the Russian to 17 matches.