US Open: Maria Sharapova’s show court stint riles rival Caroline Wozniacki

It’s never easy keeping everyone happy, particularly when you have to decide which star player gets which tennis court at major tournaments.

Those tensions were laid bare Thursday when Maria Sharapova’s rival Caroline Wozniacki was riled by US Open officials putting the Dane on court 17 where she lost in the second round to Ekaterina Makarova.

Feeling despondent after losing 6-2, 6-7, 6-1 to the unseeded Russian, Wozniacki tipped her hat to her opponent before turning her ire on Sharapova who won her first two matches on the US Open’s main stage – the prestigious Arthur Ashe Stadium.

“I understand completely the business side of things, but someone who comes back from a drugs sentence – performance-enhancing drugs – and all of a sudden gets to play every single match on Center Court, I think that’s a questionable thing to do,” fifth-seeded Wozniacki told Danish newspaper Ekstra Bladet.

Bright lights

In March 2016, Sharapova announced that she had tested positive for meldonium. She said she failed to realize the heart drug she had taken for more than a decade for various health issues had been added to the prohibited list of the World Anti-Doping Agency from January 1, 2016.

Initially, she was given a two-year ban by the International Tennis Federation, but it was reduced on appeal to 15 months.

Sharapova was granted a wild card entry to the US Open after serving the 15-month ban and the five-time grand slam winner quickly made her mark by dropping No. 2 seed Simona Halep in the first round.

Sharapova is set to play 18-year-old American Sofia Kenin in the third round on Friday – again under the Arthur Ashe Stadium’s bright lights.

READ: Maria Sharapova wows US Open crowd in first major match since doping ban

READ: Sharapova beaten by vocal critic Bouchard

Icy past reignited

Former world No. 1 Wozniacki and 30-year-old Sharapova have history, with the Dane critical of the way the Russian’s return to professional tennis at a tournament in Stuttgart in April was handled.

“I think it is disrespectful to other players and the WTA,” Wozniacki said in March. “I think it’s questionable allowing – no matter who it is – a player that is still banned to play a tournament that week.”

Canadian Eugenie Bouchard also let rip at a tournament in Istanbul in April where Sharapova was given another wild card.

“She’s a cheater,” said the former Wimbledon finalist, “so to me, I don’t think a cheater in any sport should be allowed to play that sport again.

“(It’s) unfair to all these players who do it the right way and are true,” she added.

It's Maria Sharapova's 'least favorite place in the world"

But locker rooms are where tennis matches can be won and lost ...

Rafael Nadal of Spain poses in the locker room with the Coupe des Mousquetaires trophy at Roland Garros in 2014.

As well as a place of preparation for matches, locker rooms are also a perfect setting for posing for photos after winning trophies. Novak Djokovic is pictured holding the Butch Bucholz trophy after winning his fifth Miami Open title in 2015.

As the old saying goes: "By failing to prepare, you are preparing to fail." Jo-Wilfried Tsonga is pictured warming up at the Hamdan Sports Complex in Dubai in 2014.

Victoria Azarenka of Belarus is pictured at Crandon Park Tennis Center at the Miami Open. Azarenka, who also isn't competing at Roland Garros, recently hinted in a tweet this week she would play at Wimbledon later this year after intending to make her own comeback -- the Belarussian gave birth to son Leo in December and hasn't played since last year's French Open -- at a Wimbledon warmup tournament.

Another absentee from the French Open is Sharapova, who was denied a wild card by the tournament organizers.

Serena Williams will miss the 2017 French Open as she's on maternity leave. Last month her publicist confirmed Serena is expecting a child with her fiance, Reddit co-founder Alexis Ohanian, and is due to give birth in the fall.

"There is such a thing as locker room power," former British Davis Cup player Arvind Parmar told CNN Sport. Here Frenchman Tsonga of the Manila Mavericks gets ready in the locker room before his team's match against the Singapore Slammers during the Coca-Cola International Premier Tennis League at the Mall of Asia Arena in November 2014.

Stanislas Wawrinka of Switzerland is pictured posing with the Norman Brookes Challenge Cup in the players' dressing room after winning his men's final match against Nadal of Spain at the 2014 Australian Open at Melbourne Park.

Access is normally restricted to players and coaches only, though exceptions can be made. Real Madrid icons Cristiano Ronaldo (L) and Raul are pictured posing with Nadal during the Madrid Masters in May 2010.

Britain's Andy Murray heads back to the locker room after finishing a practice session at Wimbledon.

London's Queen's Club's dressing room decor has a more old school feel.

Success = champagne celebration in the dressing room. Djokovic is pictured celebrating after winning 2008 Australian Open final against Tsonga in 2008.

Switzerland's Roger Federer is filmed by a TV crew holding the Wimbledon trophy as he enters the dressing room after beating Andy Roddick of the US in the 2009 final. Federer has opted not to play at this year's French Open.

Photos: What goes on in tennis locker rooms?

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READ: Tennis locker room confidential

‘Unacceptable’

Wozniacki was given extra ammunition after her loss at Flushing Meadows, given that her match was originally slated for a late start on court five but was moved to court 17 after a backlog created by Tuesday’s rain.

Sharapova has not reacted publicly to Wozniacki’s comments, but after her first-round win on Monday the Russian said her ban was now in “the past.”

“Putting out a schedule where the No. 5 in the world is on court five, fifth match on, that’s unacceptable,” added Wozniacki.

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“I think someone who has fought their way back from injury and is five in the world deserves to play on a bigger court than court five.

“Finally, they moved us to court 17, which is a really nice court, actually, and we had a great atmosphere out there. But they should look into what they need to do in the future.”

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The USTA’s managing director of corporate communications Chris Widmaier told the New York Daily News that Wozniacki’s ire was understandable.

“When you see the stress on the scheduling system because of the sheer number of matches that had to be played, it would be tough for it to be perfect for everyone,” said Widmaier.

“We understand Caroline’s point of view, we’ve heard her. We always want to do the best we can. We’re sorry she’s disappointed.”

The USTA didn’t immediately respond to CNN’s request for an explanation of the US Open’s court scheduling decisions.