Emma Raducanu's hopes of facing idol Simona Halep in the semi-finals of the Transylvania Open were brutally ended by a crushing defeat to Marta Kostyuk on Friday.

US Open champion Raducanu claimed her first ever regular WTA Tour win in Cluj earlier this week, with the 18-year-old keen to impress in the homeland of her father, but Kostyuk denied her the chance of a dream last-four clash with Halep.

The 19-year-old Ukrainian swept Raducanu aside in just 57 minutes, winning 6-2 6-1 as Kostyuk furthered her own burgeoning reputation in the game by reaching a third semi-final of the year.

Raducanu proved her own worst enemy, her 41 unforced errors more than double Kostyuk's 16, with the latter feeling confident as early as the first game when two double faults helped her break the Briton's serve.

"I don't know how I won the first game, I think that's where everything started," Kostyuk said. "I somehow won that game and I gained this confidence, like I'm not going to lose this match.

"After that, by the fifth game maybe, I figured out how to play her – today. Maybe next time I play it's going to be different tactics."

Top seed Halep enjoyed a similarly straightforward victory as she lost just two games en route to a 6-1 6-1 win over Romanian compatriot Jaqueline Cristian, a particularly impressive feat given she had been suffering with a back injury this week.

That success preserved Halep's 100 per cent record against fellow Romanians.

On the other side of the draw, second seed Anett Kontaveit was also an impressive winner as she disposed of Anhelina Kalinina 6-1 6-3 in just over an hour. Kontaveit has won 24 of her last 26 matches and will be the firm favourite against unseeded Rebecca Peterson, who beat Lesia Tsurenko 6-2 3-6 6-3.

At the Courmayeur Open in Italy, third seed Liudmila Samsonova cruised into the semis thanks to a swift 6-1 6-2 demolition of Anna Kalinskaya. She will meet Clara Tauson – seeded fifth – after the Dane came through a more gruelling 3-6 6-4 6-2 win over Ann Li.

The other semi will be contested by Donna Vekic and Jasmine Paolini, who were straight-sets winners over Wang Xinyu and Dayana Yastremska, respectively.

Emma Raducanu is on course to face her idol Simona Halep for the first time in the Transylvania Open after they both advanced to the quarter-finals on Thursday. 

Raducanu celebrated her first WTA Tour win at the expense of Polona Hercog in Cluj on Tuesday and followed that up with a 6-3 6-4 defeat of Ana Bogdan. 

The 18-year-old US Open champion had a first-serve percentage of 69 and won 87 per cent of those points, breaking three times to move into the last eight. 

Third seed Raducanu said: "It's definitely taking me some time to find my feet still. I'm just taking some learnings from every match that I play. I don't think I'm the finished product yet." 

Next up for the Brit is a meeting with fellow teenager Marta Kostyuk after the sixth seed sent Mona Barthel packing with a 6-4 6-4 victory. 

Halep was troubled by a back injury in a 6-4 6-2 success over Varvara Gracheva in her homeland. 

The two-time grand slam champion played through the pain barrier, breaking twice in each set to progress, and could face Raducanu if she beats fellow Romanian Jaqueline Cristian. 

"The back got blocked and the pain is really big," Halep said in the on-court interview. "You cannot really bend much and you cannot move. 

"But sometimes you are used to the pain, I had this before many times, and I just wanted to continue and finish this match. It's good that I won this match, I don't know how." 

Anett Kontaveit, striving to secure a WTA Finals berth, extended her indoor winning run to 12 matches by seeing off Alison Van Uytvanck 6-3 6-4, while Rebecca Peterson knocked Irina Bara out in straight sets. 

In the Courmayeur Open, Jasmine Paolini came out on top 6-4 7-5 in an all-Italian battle with Lucrezia Stefanini and Zhang Shuai got past Wang Xinyu 7-6 (7-5) 6-4. 

The unseeded Donna Vekic also secured a place in the quarter-finals. 

Emma Raducanu collected her first WTA Tour victory as she defeated Polona Hercog at the Transylvania Open in Romania.

Raducanu, who was the surprise US Open champion in September after not dropping a set throughout the tournament, appeared at just her fourth tour-level tournament and came to Cluj as third favourite.

The 18-year-old had lost opening-round matches at previous events in Nottingham, San Diego and Indian Wells.

However, world number 23 Raducanu finally recorded her first victory as she overcame a first-set scare to triumph over Hercog 4-6 7-5 6-1.

In the opening match of Tuesday's fixtures, sixth seed Marta Kostyuk cruised past Bernard Pera 6-3 6-4 to secure her last-16 berth.

Irina-Camelia Begu, ranked one behind Kostyuk for the tournament, did not enjoy similar fortunes as Romanian compatriot Irina Bara triumphed 7-6 (7-2) 0-6 6-4.

Jaqueline Cristian survived a marathon slog against Kaja Juvan as she came from a set down to win 3-6 7-6 (10-8) 7-6 (7-3) and book a second-round meeting with Ajla Tomljanovic.

Number one seed Simona Halep – who departed at the quarter-final stage of the Kremlin Cup last week – plays her first game on home turf on Wednesday against Elena-Gabriele Rusa and could meet Raducanu in the semi-final stages.

Meanwhile, Liudmila Samsonova, the third favourite at the Courmayeur Open, cruised past Stephanie Wagner 6-3 6-0 while seventh seed Jasmine Paolini comfortably dispatched Martina Di Giuseppe 6-4 6-1.

Shuai Zhang, who is the third seed in Italy, also enjoyed a routine victory as she eased past Jessica Pieri 6-1 6-3 after fourth favourite Petra Martic crashed out 3-6 4-6 to Saisai Zheng.

US Open champion Emma Raducanu has withdrawn from next week's Kremlin Cup.

Raducanu made history last month by becoming the first qualifier to win a major title with her triumph at Flushing Meadows, where she did not drop a single set all tournament.

However, the 18-year-old was beaten in her first match since that breakthrough success with a straight-sets loss to world number 100 Aliaksandra Sasnovich at the Indian Wells Open last week.

And Raducanu has now taken the decision to pull out of the Kremlin Cup in Moscow, which takes place next week.

In a statement released on Thursday, the Briton did not give a reason for her withdrawal but suggested she could return for the Transylvania Open later this month.

"Unfortunately I've had to make a tournament schedule change and won't be able to play Moscow this year, but I hope to compete there and in front of the Russian fans next year," said Raducanu, who is also due to compete at the Linz Open before the season is out.

"I look forward to returning to the tour in the next couple of weeks."

Speaking after her defeat to Sasnovich, Raducanu said she will need time to come to terms with her maiden grand slam triumph.

"I'm kind of glad that what happened today happened so I can learn and take it as a lesson. So going forward, I'll just have more experienced banked," she said.

"I think it’s going to take me time to adjust really to what's going on. I mean, I'm still so new to everything. I'm 18 years old. I need to cut myself some slack."

US Open champion Emma Raducanu is refusing to be downcast after her defeat to Aliaksandra Sasnovich, insisting that she is focused on "the bigger picture".

The 18-year-old's 10-match winning run came to an abrupt halt at the Indian Wells Open – just her fifth tour-level event – as Sasnovich won in straight sets.

Sasnovich is ranked 100th in the world, but the 27-year-old has 16 career victories over opponents in the top 20, with Raducanu ranking 17th, and six over those in the top 10.

Raducanu cites the experience gap between herself and Sasnovich as a major factor in her defeat and believes that the loss can be taken as a positive lesson.

"I'm still very, very new to the tour," Raducanu said. "I think that experience just comes from playing week in, week out and experiencing all these different things. I'm kind of glad that what happened today happened, so I can learn and take it as a lesson so going forward I'll just have more experienced banked.

"[Sasnovich's] been on tour, probably been 4-2 down like hundreds of times whereas I've been 4-2 up... it's my third WTA tournament this year. [Experience] will come in time. Just got to not rush it and keep going and get my head back to the drawing board really.

"I didn't go in there putting any pressure on myself because in my mind I'm so inexperienced that I'm just taking it all in. You're going to have highs, and you're always going to have some lows where you're disappointed with how you performed.

"Aliaksandra played an extremely great match. You could tell she's more experienced than me. She went out there and executed her game plan better than I did. She deserved to win that.

"I think it's going to take me time to adjust, really, to what's going on. For the bigger picture, I'll be thanking this moment. That's the lesson I think, that you can easily get sucked into being so focused on the result and getting disappointed."

Raducanu is set to take part at the Transylvania Open that starts on October 25, as well as the Kremlin Cup in Moscow.

US Open champion Emma Raducanu was sensationally beaten in her first match following her Flushing Meadows triumph, going down in straight sets to Aliaksandra Sasnovich at the Indian Wells Open on Friday.

The Belarussian, who is currently ranked 100th, stunned the 19-year-old Briton 6-2 6-4 in one hour and 25 minutes.

Raducanu had been on a 10-match winning streak coming into her maiden Indian Wells campaign.

"I'm still so new to everything. The experiences that I'm going through right now, even though I might not feel 100 per cent amazing right now, I know they're for the greater good," Raducanu said after the defeat.

"I mean, I'm 18 years old. I need to cut myself some slack."

Raducanu, who did not drop a set during her US Open run, appeared in control early after winning the opening six points, but Sasnovich claimed the first break in the third game.

Unforced errors proved costly for Raducanu as the clean-striking Sasnovich capitalized to win the first set, before opening the second set with another break.

Raducanu responded with an immediate break back and led 4-2 in the second set, before the Belarussian hit back by winning the next four games to topple the British teenager.

"It was a really good match for me. I play really well," Sasnovich said. "I know she just won US Open. I lost there in the first round. But I tried to go on court, I tried to enjoy. I did everything right."

FORMER WINNER HALEP PROGRESSES

Sasnovich will face two-time Grand Slam winner Simona Halep in the third round after the Romanian defeated Marta Kostyuk 7-6 (7-2) 6-1 in one hour and 33 minutes.

The 11th seed, who split with long-time coach Darren Cahill last month amid an injury-disrupted year, was down a break early before working her way back and dominating the tiebreak.

Halep broke twice in a more controlled second set to claim victory in her 10th appearance at Indian Wells.

"I missed a lot playing tennis at this level this year because I've been injured and many months, I couldn't play matches," said Halep, who won at Indian Wells in 2015. "I came here a little more aggressive than normal and I'm trying to improve my game and myself."

KVITOVA CRUISES AS TOP SEEDS WIN

Two-time major winner Petra Kvitova eased into the last 32 with a 6-2 6-2 triumph over Arantxa Rus from the Netherlands.

Seventh seed Kvitova set up a showdown with two-time Australian Open champion Victoria Azarenka after she beat Magda Linette 7-5 3-0 in a walkover. Kvitova leads Azarenka 5-3 in head-to-head battles.

Second seed Iga Swiatek dominated Croatian Petra Martic 6-1 6-3 to seal her passage into the third round, while fourth seed Elina Svitolina got past Teresa Martincova 6-2 7-5.

Beaten 2021 US Open finalist Leylah Fernandez triumphed over experienced Frenchwoman Alize Cornet 6-2 6-3 and will play ninth seed Anastasia Pavlyuchenkova in the third round after she easily accounted for Madison Keys 6-3 6-1.

Emma Raducanu still has so much to improve and it is far too early to declare her a contender to win every tournament, according to Tim Henman.

The 18-year-old achieved stunning success at the US Open, winning the grand slam event as a qualifier without dropping a set.

Raducanu will play her first match since that famous Flushing Meadows triumph when she takes on Aliaksandra Sasnovich at the Indian Wells Open on Friday.

The youngster has been rated as favourite to win the tournament, which is seen as one of the most prestigious outside of the four majors.

There is already talk of her qualifying for the lucrative season-ending WTA Finals and triumphing at Wimbledon next year, having burst onto the scene in 2021 by reaching round four at All England Club.

But fellow Briton Henman urged fans to show caution with what they expect from Raducanu before her first match in 27 days against seasoned pro Sasnovich.

Raducanu has regularly discussed her lack of experience at tour level while she searches for a new coach to show her the ropes and Henman did not want to entertain discussions of her winning Wimbledon in 2022.

"I think that is probably getting a little ahead of ourselves," Henman said to talkSPORT. 

"She has shown her enormous potential by what she did in New York, but she is still so young and so inexperienced. 

"She has played so few events on the tour, let alone at grand slam level. I think it’s very easy to get ahead of ourselves.

"Regarding some of the young up and coming players, to really understand where they are at and their development, for me you get a very good insight once they have played every tournament twice.

"To put it into context, she has never played the clay court swing, she’s never played Roland Garros, she has never played the Australian Open.

"Once she has played all those events twice, then we will be able to assess where her game is at.

"Right now, it is as much about the process as the outcome and keep developing her game."

Henman, though, was in no doubt that Raducanu is a prodigious talent.

He added: "What is exciting is that she can improve in so many areas. 

"It is easy to focus on her tennis game, but she can get fitter, stronger, faster and gain experience playing at the highest level and continue improving her tennis game.

"If she does that then I think she will go on and win more tournaments in the future.

"It was a privilege to be on the side of the court for all her main draw matches and just see the quality of her tennis at close quarters.

"Her resilience mentally, her composure and the consistency was incredible. To win 20 straight sets to qualify and win a grand slam is unprecedented in our sport, it was a real pleasure to watch."

While Raducanu received a first-round bye, Sasnovich had an easy opener as she beat Maria Camila Osorio Serrano in straight sets.

The Belarusian has never won a WTA Tour event or reached the last eight of a major.

Emma Raducanu said she will not be rushed into appointing a new coach as the US Open champion prepares to make her Indian Wells debut this week.

Teen sensation Raducanu made history when she became the first qualifier to win a grand slam title at Flushing Meadows last month.

The 18-year-old split from coach Andrew Richardson following her stunning triumph in New York, revealing she wants to work with someone who has greater WTA Tour experience. 

Raducanu will work with Jeremy Bates, the Lawn Tennis Association's national coach, when she plays her first tournament as a major champion at the Indian Wells Open in California.

The Brit, who will face Maria Camila Osorio Serrano or Aliaksandra Sasnovich first up after being given a bye into the second round, will take her time to mull over who will be her permanent coach.

She said in a press conference on Tuesday: "Jeremy is part of women's tennis at the LTA so while he's here he's helping me out.

"But going forwards I'm just going to wait and find the right person, I'm not going to rush into anything. I want to make sure I make the right decision.

"Even though I'm quite young I've got a lot of experience banked and at the end of the day you're out there on your own and you have to be your own coach on the court, so I'm pretty comfortable."

Raducanu is relishing being back in action after a whirlwind few weeks off the court following her US Open heroics.

"I'm very excited to be here," Raducanu added.

"It's my first time playing in Indian Wells, and it's a beautiful place. I just can't wait to get started. I love the facilities, everything is just so nice to be around.

"I don't really want to change anything. What got me to this point is not thinking anything differently so if I put additional thoughts in my head then that will just create a problem I think. I'm just going to keep going about my business and staying the same.

"It's been a very cool three weeks. I got to experience some great things that I probably never would have got to do before but after that I just went straight back to training and focusing on this competition and the upcoming ones that I've got lined up."

Emma Raducanu has been given a wildcard entry to the Indian Wells Open in her first tournament since winning the US Open.

The 18-year-old claimed a sensational triumph at Flushing Meadows earlier this month, becoming the first qualifier to take a major title.

Raducanu defeated fellow unseeded teenager Leylah Fernandez 6-4 6-3 in the final of only her second grand slam.

The Briton did not drop a set throughout her fairytale run and climbed from 150th in the WTA rankings to now sit 22nd.

And Raducanu's remarkable display has earned her the opportunity to enjoy further stateside success at Indian Wells, having missed the cut when the entry list was first announced during the US Open.

She still has an outside chance of making the WTA Finals in Guadalajara, with appearances planned at tournaments in Russia and Romania later in October.

Raducanu's hopes of another deep run at Indian Wells have been boosted by the absence of superstar pair Naomi Osaka and Ash Barty, who have both withdrawn from the event.

US Open champion Emma Raducanu has split from coach Andrew Richardson and wants to partner with someone with greater WTA Tour experience. 

Richardson had coached Raducanu in her younger days at Bromley Tennis Centre and accompanied the 18-year-old for her campaign at Flushing Meadows. 

The experience proved unforgettable as the Briton, ranked 150 in the world at the time and having played in just one other major previously (Wimbledon in July), took the title after moving through qualifying and the main draw without dropping a set. 

She became the youngest grand slam finalist since Maria Sharapova won Wimbledon as a 17-year-old in 2004 and is the only qualifier in tennis history to win a major final. 

Her astonishing triumph catapulted her to 22 in the WTA rankings and Raducanu is now looking for someone to guide her through the next phase of her career. 

Speaking at a homecoming event organised by the Lawn Tennis Association, she said: "Where I was at after Wimbledon, I was ranked around 200 in the world and at the time I thought Andrew would be a great coach to trial, so we went to the States but never did I even dream of winning the US Open and having the run I did, and now I'm ranked 22 in the world, which is pretty crazy to me. 

"I feel like at this stage in my career, and playing the top players in the world, I realised I really need someone right now that has had that WTA Tour experience at the high levels, which means that I'm looking for someone who has been at that level and knows what it takes. 

"And especially right now because I'm so new to it, I really need someone to guide me who has already been through that. 

"Obviously having such an experience with your team, it's tough to have that conversation with anyone, but I think for me, it's just really what I need." 

It has been suggested Raducanu could look to partner with Darren Cahill, the renowned coach who split with Simona Halep this month. 

For now, she is considering when to make a competitive return to action, with the notable Indian Wells Open coming up. 

"I'll decide in the next few days where I'm going to go to but, wherever I play next, I'm going to make sure I'm ready. I don't want to jump into things too early," she said. 

Emma Raducanu still has the hunger to continue improving following her record-breaking US Open triumph and is targeting a possible return to action at Indian Wells.

The 18-year-old became the first qualifier in history to win a grand slam when defeating Leylah Fernandez ​in straight sets in Saturday's final at Flushing Meadows.

Raducanu, ranked 150 by the WTA before beginning her three-week long tournament, did not drop a single set across her 10 matches.

That victory in New York capped a life-changing couple of months for Raducanu, who also reached the last 16 of Wimbledon in her only other grand slam appearance before withdrawing due to medical reasons.

After spending a few days away from the court and taking in some of the sights the Big Apple has to offer, the Briton is ready to start preparing for her next tournament.

"I have a few days' rest and recovery," Raducanu, who became the first British female to win a major tournament since Virginia Wade on home soil at Wimbledon 44 years ago, told CNBC's Closing Bell programme.

"I think it was needed after the last seven weeks but then I am straight back to training and hungry to get better and come back out and play some more tournaments."

Raducanu was originally due to take part in qualifying for the Chicago Fall Tennis Classic later this month, but she may instead wait for next month's delayed Paribas Open in Indian Wells, where a wildcard entry is likely.

"After the US Open I wanted to give myself this week to completely switch off from tennis because it's been an extremely intense but rewarding seven weeks," she told the WTA's official website. 

"But I've worked very hard to finish on such a high with the US Open, a whole week off was needed.

"I know I'll get back to work probably Monday or early next week to get back to training again. Schedule-wise, I'm not sure. Maybe Indian Wells, I don't know. I'm going back to London before my next tournament for sure."