World number one Jannik Sinner has been "worn down physically and mentally" by an investigation into his positive tests for a banned substance, says his coach Darren Cahill.
In March, Australian Open champion Sinner twice tested positive for clostebol – a banned substance that can be used to build muscle mass.
However, an independent tribunal last week found he was inadvertently given the substance in an over-the-counter spray by his physiotherapist Giacomo Naldi.
Sinner has won ATP-level titles at Halle and Cincinnati since the positive tests, but he was eliminated from the French Open at the semi-final stage and only reached the last eight at Wimbledon.
He then missed the Paris Olympic Games after being diagnosed with tonsillitis, and Cahill feels it was no coincidence that he failed to hit top form while the probe was ongoing.
"I guess if you are not a Jannik fan, you may not see too much difference in what he has been doing the last few months because he has still been playing quite well," Cahill told ESPN.
"But if you are a Jannik fan, you would have seen a big change in his body language, his physicality on the court, his excitement to be on the court.
"He's struggled and I think it's worn him down physically and mentally. He got tonsillitis, which is the reason why he missed the Olympics."
Some have been critical of the decision to clear Sinner of any wrongdoing, with 2022 Wimbledon runner-up Nick Kyrgios particularly vocal in his reaction.
Kyrgios wrote on X it was "ridiculous" that Sinner had escaped a ban, saying the Italian deserved to be hit with a two-year suspension.
Former Wimbledon semi-finalist Denis Shapovalov also suggested the decision was at odds with other players receiving bans over similar incidents.
Cahill, however, is of the belief Sinner would never intentionally take a banned substance, adding: "I just want to stress that he's maybe the most professional young man that I have ever had the chance to work with.
"He would never ever intentionally do anything, and he's in a situation that is incredibly unfortunate."
Gauff took a relaxed approach in China Open final
Coco Gauff said her China Open triumph over Karolina Muchova came down to being relaxed.
Gauff won 6-1 6-3 in just 76 minutes in Beijing to become the youngest winner of the tournament in 14 years.
The victory marked the 20-year-old's second WTA 1000 title, which makes her the second-youngest player since the format was introduced to win her first two finals.
And Gauff explained she took a more relaxed approach in Sunday's showdown.
"I was just like, 'This match is not going to change my life.' I knew regardless of the result today, I was proud. I was able to overcome and still work on things that I've been practising on, too, and stick to it," she said.
"When you get that far, you're just happy to be in the final. I think it's just being relaxed. My first final, when I was 15, was the worst because you're like, 'I'm never going to get this opportunity again,' which is completely not true.
"The experience of winning in the past, I realise that, yes, winning is great. It feels great right now. But tomorrow I'm going to wake up and it's a different day, 70% of the world doesn't know anything about whether I won or lost, probably even more."
Gauff has now claimed three straight wins over Muchova, who is yet to beat the American.
"I lost to her three times in a row. I'll say very similar losses. It was always the latest rounds of the tournaments when I got many matches under the belt," said Muchova.
"It's very physical with her. I felt like second [best] always in the rallies."
Alcaraz passes stern Wu test to progress in Shanghai
Carlos Alcaraz held his nerve against a spirited Wu Yibing to progress to the fourth round of the Shanghai Masters.
Having already beaten another of the home favourites, Shang Juncheng, in his opener, the Spaniard had to dig deep but prevailed 7-6 (7-5) 6-3 in one hour and 41 minutes on Sunday.
There was nothing to split the two in the opening set, though Wu caused some real problems with his power, and successfully defended two break points in the ninth game.
The tie-break was also tight, but Alcaraz found his edge at the right time, winning the last three points.
Buoyed by the home crowd, Wu started the second set strongly too, but Alcaraz absorbed the pressure well and got the only break of the match in a three-game winning run.
With his winning streak extended, Alcaraz will now face either Gael Monfils or Ugo Humbert in the next round.
Data Debrief: Alcaraz marches on
Alcaraz has put his shock US Open exit firmly behind him, with this his 11th win on the bounce since then.
He coped well with the early pressure Wu threw at him, and put in another solid performance, hitting 11 aces and winning 71% of his points at the net (5/7).
Gauff races to second title of 2024 with China Open cruise
Coco Gauff claimed the China Open title in emphatic fashion on Sunday, bringing up her second WTA Tour trophy of the season.
The world number six defeated US Open semi-finalist Karolina Muchova 6-1 6-3 in just 76 minutes to be crowned the youngest winner of the China Open in 14 years.
Gauff swiftly broke the Czech's serve to propel herself into a 2-0 lead before going on to dominate the first set, which lasted only half-an-hour.
Muchova looked to be surmounting a comeback in the second set, breaking immediately, but Gauff fought straight back, and the American broke Muchova once more to race to victory in Beijing.
It was an impressive win against an opponent who had defeated world number two Aryna Sabalenka and Olympic gold medallist Zheng Qinwen en route to the final. Gauff played 24 winning shots but restricted the world number 49 to just 14.
It marked Gauff's second WTA 1000 title, making her the second-youngest player since the format was introduced to win her first two finals, only older than Bianca Andreescu.
Data Debrief: Gauff a proven winner
Gauff, who was playing her 101st WTA 1000 match, is now the first player to win each of her first seven WTA hard-court finals in the Open Era.
Her victory meant she became the second American player to win the women's singles title at the China Open after Serena Williams (in 2004 and 2013 since the inception of the tournament in 2004.
Gauff has now defeated Muchova in all three meetings in WTA events, previously beating her at the US Open and Cincinnati Open in 2023.
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