Rafael Nadal is “100%” given preferential treatment by umpires, claimed Denis Shapovalov after his defeat by the Spaniard in their Australian Open quarter-final.

Shapovalov was unhappy with the amount of time he thought Nadal was taking between points and twice complained to umpire Carlos Bernardes.

“I think it’s unfair how much Rafa is getting away with,” said Shapovalov.

In reply, 35-year-old Nadal said: “I believe he is wrong in this case.”

Shapovalov, 22,lost in 5 sets to 20 time Grand Slam champion Nadal at Melbourne Park on Tuesday, having fought back to level after going two sets down.

At the start of the second set, Shapovalov asked Bernardes to give a time violation to the sixth seed.

When the official did not see fit to do so, Shapovalov shouted: “You guys are all corrupt.”

In his post-match news conference, 14th seed Shapovalov said he “misspoke” during the match with emotions riding high but still stood by the wider point.

Players are allowed 25 seconds between shots and two minutes between sets, all timed by a shot clock.

Asked whether he thinks Nadal receives preferential treatment, Shapovalov said: “Of course – 100% he does, 100%. Every other match that I have played, the pace has been so quick because the refs have been on the clock after every single point.

“I’m completely ready to play and the clock is ticking 3, 2, 1, clicking towards zero.

“I’m looking at the umpire and obviously I’m going to speak up and say something.

“I’ve been ready to play for a minute and a half, and he tells me he’s not going to give him a code violation because I’m not ready to play. To me, it’s a big joke if somebody says that.”

Shapovalov added: “I respect everything that Rafa has done and I think he’s an unbelievable player. But there have got to be some boundaries, some rules set.

“It’s just so frustrating as a player. You feel like you’re not just playing against the player; you’re playing against the umpires, you’re playing against so much more.”

The first complaint came after Nadal changed his kit at the end of the first set and Shapovalov remonstrated with Bernardes again before the second game about how long Nadal was taking to serve.

“I know I took some extra time at the end of the first set because I had to change everything there on the chair in the changeover,” said Nadal, who won his only Australian Open title in 2009.

“It’s obvious you can’t play with the clothes in the condition that I was. After that, I was going through all the rules.”

On Shapovalov’s claim he received preferential treatment, Nadal added: “I really believe it’s always in the mind that the top players get bigger advantages and honestly on court is not true.

“I never feel that I had advantages on court, and I really believe that he’s wrong in that case.”

The organisers of the Australian Open have reversed a ban on T-shirts supporting Chinese tennis player Peng Shuai after a global outcry.

Last Friday, security staff had asked spectators to remove T shirts and a banner saying “Where is Peng Shuai?” before entering the grounds.

Ms Peng vanished for weeks after accusing a top Chinese official of sexual misconduct in November.

She has since re-appeared, but many remain concerned about her wellbeing.

Craig Tiley, chief executive of Tennis Australia – the organising body behind the Australian Open – told reporters they would now allow spectators to wear the T-shirt as long as they attended without the “intent to disrupt” and were “peaceful”.

“If someone wants to wear a T-shirt and make a statement about Peng Shuai that’s fine,” he was quoted as saying in The Sydney Morning Herald.

But he added that banners would still not be allowed as “it really takes away from the comfort and safety of the fans”, and that security staff would make decisions on a case-by-case basis.

Tennis Australia had earlier told the BBC that they had a “longstanding policy of not allowing banners, signs or clothing that are commercial or political.”

They added they were “happy to welcome” the spectator back to the tournament grounds, but said that “the policy will continue to be applied .. to any items that compromise the safety and comfort of Australian Open fans.”

It did not elaborate further.

The decision to ban the shirt was met with fierce criticisms from human rights groups and the international tennis community, with some suggesting that organisers were bowing to pressure from major Chinese corporate sponsors.

Australia’s defence minister Peter Dutton also lashed out against the ban, calling Tennis Australia’s actions “deeply concerning” in an interview with broadcaster Sky News.

“I think we should be speaking up about these issues, and I’d encourage… tennis organisations, including Tennis Australia [to do so].”

Mr Dutton also praised the actions of the Women’s Tennis Association (WTA), which has pulled all tournaments from China this year in response to the controversy.

Friday’s incident has also sparked the creation of a Gofundme page that promised to print out more T-shirts after reaching its AUD$10,000 (£5,296; $7,179) goal.

Tennis Australia is not the only body that has terms and conditions governing spectators’ attire and conduct.

The All England Lawn Tennis Club, which organises Wimbledon, prohibits “any objects or clothing bearing… political statements, objectionable or offensive statements” from the tournament grounds.

In November, Ms Peng posted a 1,600-word note on Chinese social media platform Weibo, accusing former Vice-Premier Zhang Gaoli of forcing her to have sex with him.

She then vanished from the public eye, triggering a wave of global concern among the international tennis community, fans and human rights groups over her whereabouts.

She resurfaced weeks later, and in her first media interview in December following her reappearance, she denied making any accusations of sexual assault and claimed her social media post had faced “a lot of misunderstandings”.

Sadio Mane scored as Senegal beat nine-man Cape Verde 2-0 in the last 16 at the Africa Cup of Nations in Cameroon.

Mane curled in off the underside of the crossbar soon after keeper Vozinha had been dismissed following a nasty clash of heads with the Liverpool forward.

Mane, appearing concussed, was led off before the game restarted and Bamba Dieng added the second in injury time.

Cape Verde midfielder Patrick Andrade had been shown a straight red card midway through the first half.

The match in Bafoussam was preceded by a minute’s silence for the victims of the crash at the Olembe Stadium on Monday

Senegal will face either Mali or Equatorial Guinea in the last eight on Sunday.