Serena Williams enjoyed one of the greatest tennis careers possible, having won 23 Grand Slam titles, losing another 10 finals.
Madison Keys emulated Williams at the Madrid Open, but it will take a long time for another player to reach the heights the latter once did.
Williams did, however, suffer a disappointing end to her career in terms of Grand Slam finals, of which she lost her last four.
The miserable run for Williams started at the 2018 Wimbledon final, where she was defeated by Angelique Kerber.
And that was followed by a 2018 US Open final loss to Naomi Osaka, a WTA clash which involved plenty of controversy.
Photo by Tim Clayton/Corbis via Getty ImagesSerena Williams texted Patrick Mouratoglou after 2018 US Open final loss
Williams was adjudged to have been coached by Patrick Mouratoglou during the match, for which she was given a code violation.
The veteran was then handed a game penalty for calling umpire Carlos Ramos a thief and demanding an apology.
She was then told post-match that Mouratoglou said he offered her advice, with Williams asked if she understood that or didn’t realise.
“So, I don’t know,” responded American icon Williams. “I literally just heard that, too, when they prepped me to come in.
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“I just texted Patrick, like, what is he talking about? Because we don’t have signals. We have never discussed signals. I don’t even call for on-court coaching.
“I’m trying to figure out why he would say that. I don’t understand… I mean, maybe he said, ‘You can do it’. I was on the far other end, so I’m not sure. I want to clarify myself what he’s talking about.”
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And when asked if the umpire had to give her the warning, she said: “No, because I wasn’t being coached.
“If I look at my box and they say, ‘C’mon’, or, ‘Good job’, I don’t know what else to do. After that I didn’t even look at my box anymore.”
Can Naomi Osaka get back to her best under Patrick Mouratoglou?
It was a bitter situation for Williams, who followed that final defeat with another at Wimbledon and another at the US Open before retiring.
Osaka meanwhile clinched her first Grand Slam title with the 6-2, 6-4 success in New York, her first of four such wins to date.
Naomi Osaka Grand Slam finals
The former WTA number one, who incidentally is now coached by Mouratoglou, has failed to replicate those heroics since peaking, with the 27-year-old currently 55th in the world rankings.
Osaka shocked fans by playing the L’Open 35 de Saint-Malo, having taken on the WTA 125 event right after her early exit from the Madrid Open last month.