A 20-time Grand Slam champion is Novak Djokovic.
The crowd is often encouraged to cheer by Novak's ear cupping.
He has won 20 men's Grand Slam titles and is a world number one with jaw-dropping athletic ability, but he is also one of his sport's most polarising figures.
The Serbian tennis player is currently in a government hotel in Australia waiting for the controversy to play out after his visa was revoked when he arrived to defend his Australian Open title.
This week's events have made him even more divisive, as a court will decide on Monday whether to deport him or not.
How has a boy who sheltered during the bombing of Belgrade in 1999 become a player who has struggled to warm the hearts of so many?
You can't make people love you.
The Wimbledon final was marred by booing of the Serb by the crowd.
His misses were booed and he was jeered in a partisan atmosphere more likely found at football stadiums than on Centre Court.
Pundits urged fans to show more respect to a great player, as they watched Novak Djokovic save match points and win a classic final.
It's hard to say why they didn't, but they have a huge fan base, and one of the sport's greats, but they didn't.
Boris Becker, his former coach, told the radio station that he couldn't make people love him.
He's a fine young sportsman with the right attitude and the right character, he just has a different view on life. He has a different view on how he eats and drinks. You can't criticize him there. I get that he's not for everyone, but that's the reason he's successful.
Does his way of celebrating make people happy? He does an extravagant gesture to the four corners of the court in gratitude.
I feel sorry for him because he knew the rules.
Is it past on-court behavior? He has been accused of exaggerating injuries, including at last year's Australian Open when Taylor Fritz said the Serb would have retired from their match if his abdomen problem was really, really bad.
In 2008, Andy Roddick made fun of the many ailments bothering the Serb at the US Open by suggesting that they might be caused by bird flu, anthrax and the like.
Is it his anger on the court? He accidentally hit a ball at a line judge and was forced to miss the 2020 US Open.
His rants at umpires and ball kids over the years have also contrasted with the calmer demeanors of his nearest rivals, and the word "arrogant" is never far from the lips of his critics.
It is worth considering what has happened off the court as well.
'Good intentions' or'selfish'?
When several players tested positive for Covid-19 at the Adria Tour event, where players did not have to social distance and were seen hugging at the net, they drew a lot of criticism.
There was still no vaccine after Croatia relaxed its lockdown rules. Dan Evans said it was a poor example to set, and Nick Kyrgios said it was a bone-headed decision to play.
The move had been driven by a pure heart and good intentions, but it had been too soon to hold the event.
He asked the Australian Open's director to relax the rules of the tournament, which included suggestions such as reducing isolation periods and having players move to private houses with tennis courts.
Again, he pointed to good intentions and said his letter had been misinterpreted as being selfish.
A Serb who wants to be liked.
The Novak Djokovic Foundation is a good example of good intentions because it builds pre-schools and supports teacher training in Serbia to give children from impoverished areas the chance to learn and play in a safe, creative, and nurturing environment.
His country is at the center of his motivation, having put playing for his national team alongside Grand Slams as his most important sporting aims, and he also loves handing out racquets to young fans in the crowd.
You only need to attend a Serbia Davis Cup tie to know that there are a lot of fans who are very vocal and happy about the fact that he has achieved huge success in an era where two other greats have also been playing.
A highly spiritual person who practises yoga and meditation and follows a plant-based diet, Novak Djokovic once put a revival in form down to a five-day mountain trek with his wife that resulted in back-to-back Grand Slam titles.
He is known as 'The Joker' early in his career when he used to do funny imitations of his teammates.
At the US Open, where it has sometimes been hostile, the level of support enjoyed by Swiss greats such as Nadal has never been higher.
Watch: Ros Atkins is on. Novak Djokovic is in Australia.
While he has brushed off the boos, he could not hide the tears at last year's US Open final when he said that he was the happiest man alive because of the love he felt from the crowd.
Serbian journalist Sasa Ozmo told the radio station that there had been unfair treatment of the player over the years.
He said that sometimes the things he has done that are positive don't get enough attention.
'Novax'
In Australia, the love he may have gained in New York evaporated this week when many locals were angry that he had been granted a medical exemption for his opposition to Covid-19.
Australians have had to endure some of the world's strictest restrictions and have viewed them as being given special treatment.
After being held in the airport for several hours, border officials said he had not met the exemption rules and his participation in the Australian Open is in the hands of a court.
The way in which he announced that he was on his way has been seen as damaging by many people because of his opposition to vaccinations.
Fans, locals, politicians and fellow players are asking for answers after he posted on social media that he had been granted a medical exemption.
If he wins the appeal against deportation on Monday, he will most likely be booed by home fans who have dubbed him 'Novax', and cheered by those waving signs of support.
If he loses the appeal, he is likely to cupping that ear again at his next event.
