Simona Halep won her first match on grass since 2019 as she cruised past Lesia Tsurenko to reach the second round of the Birmingham Classic on Monday.

Halep's last grass-court match was the impressive 6-2 6-2 defeat of Serena Williams in the 2019 Wimbledon final.

While Monday's triumph may not have been of comparable importance, the 6-1 6-4 win was a positive step in Halep's preparation for a return to SW19 later this month.

After saving three break points in the very first game, the former world number one rarely looked in trouble against her Ukrainian opponent, breaking Tsurenko's serve at the first opportunity.

She repeated the feat to go 5-1 up before serving to love to close out the set, though Tsurenko showed a bit more fight at the start of the second – only one of the first five service games was a hold.

Halep ultimately weathered the storm, however, taking her chance to go 5-4 up and once again served to love to wrap up the match.

Seeded second, Halep was the only seed in action on Monday and will meet home favourite Harriet Dart next, with the Brit impressively seeing off Camila Osorio – ranked 45 places better off – 6-2 6-0.

In Berlin, fourth and sixth seeds Karolina Pliskova and Daria Kasatkina secured their passage to the last 16.

Pliskova struggled initially against Kaia Kanepi but went on to produce two near-flawless sets to progress 6-7 (6-8) 6-0 6-0 – Kasatkina also came from behind, with an ankle injury to Anhelina Kalinina potentially aiding her 5-7 6-3 6-1 victory.

Bianca Andreescu was also among the winners in Berlin, with the Canadian beating Katerina Siniakova to claim only her second career success on grass.

Novak Djokovic returns to the grand slam arena, Carlos Alcaraz is threatening to follow in the footsteps of Rafael Nadal, and Iga Swiatek is suddenly unstoppable.

The French Open is rich in promise as the Roland Garros clay courts are swept in anticipation of the greats of tennis stepping out to begin their campaigns.

It has been the women's draw that has looked the most wide open in recent seasons, yet this year it is hard to look beyond Swiatek; however, the men's title battle promises to provide a sensational battle.

Here, Stats Perform assesses the contenders for the two main trophies: the Coupe des Mousquetaires and the Coupe Suzanne Lenglen.

KID INTERRUPTS G.O.A.T. RACE

Nadal took full advantage of Djokovic and Roger Federer being absent from the Australian Open, carrying off his 21st grand slam title to go top of the men's all-time list, one ahead of those two great rivals.

Federer is again missing, rehabbing after knee surgery, and the likelihood is he has played his final major already, but Djokovic is emphatically back. His confidence is surging once more, having taken a knock amid the drama of his deportation from Australia in January and being frozen out of the Indian Wells and Miami events due to the United States' COVID-19 rules.

A semi-final run in Madrid, where he lost a three-set monster to Alcaraz, was followed by Djokovic carrying off the Rome title for a sixth time when he saw off Stefanos Tsitsipas in the final.

Djokovic turns 35 on Sunday, as main-draw action gets under way in Paris, but he is the defending champion and firmly believes he can succeed again.

Assessing his prospects for Paris, Djokovic said after his Rome triumph: "With rankings and the way I've been playing in the last few weeks, I would rate myself as one of the favourites. I don't obviously spend too much time thinking who's going to win it or who might have the best chance. I always think about myself.

"I go there with the highest ambitions. I really like my chances. Best-of-five, you play every second day. It's a grand slam. It's different. Really, the grand slams are played different. You have to approach it differently. But the way I've been feeling on the court and off the court in the last few weeks, I really think I can go far."

The chief threat to Djokovic could come not from 'King of Clay' Nadal, but from the 13-time champion's fellow Spaniard, 19-year-old Alcaraz.

Bidding to become the first teenage winner of the men's title since Nadal, also 19, triumphed for the first time in 2005, Alcaraz arrives in Paris with four titles already secured this year, including three on clay in Rio, Barcelona and Madrid. The other title came on hardcourt at the Masters 1000 event in Miami, and Alcaraz has rocketed from 32nd at the start of the year to number six in the world rankings.

Many expect his grand slam haul to reach double digits, just like the Big Three he has grown up watching and learning from. The first slam must come somewhere, and it might well come in Paris in a fortnight's time.

Don't discount Nadal, but his form has been a shade unconvincing since coming back from a rib injury, while Tsitsipas looks the next most likely after winning on clay in Monte Carlo and finishing runner-up to Djokovic in Rome. The Greek has unfinished business in Paris, after the heartache of losing last year's final from two sets up.

IGA TO PLEASE? POLE GOES FROM SHOCK WINNER TO FIRM FAVOURITE

The first thing to point out is that the French Open women's singles title has been won by eight different players in the last eight years.

Iga Swiatek was a surprise champion in 2020, at the tournament that was delayed until the Paris autumn due to the pandemic. She was ousted by Maria Sakkari in the quarter-finals last year but returns on a roll, having won an incredible five consecutive tournaments.

The 20-year-old has won 38 of the last 39 sets she has contested, the odd one out going against her on a tie-break, and her winning streak has reached 28 matches. Since Ash Barty retired, nobody has been able to lay much of a glove on Swiatek.

If she wins the French Open, that run will reach 35 matches, equalling the longest run in the 2000s, previously achieved by Venus Williams during a glory run that saw her win events including Wimbledon, the Olympic Games and US Open in the year 2000.

Tunisia's Ons Jabeur has been spoken of as a possible challenger to Swiatek, but she was swatted away 6-2 6-2 by the youngster in the Rome final last weekend.

So who challenges the favourite? Even those who have been there and done that struggle to look beyond Swiatek. According to Martina Navratilova: "You can’t be any hotter than she is right now."

Navratilova told the WTA website: "She looks pretty unbeatable on any surface, particularly the clay now."

The last player to beat Swiatek was Jelena Ostapenko, in Dubai. Ostapenko, a surprise 2017 French Open champion, had a sizzling spell of form in February but has gone off the boil since. It might take someone of her hard-hitting nature to knock Swiatek out of her stride, though, so if Ostapenko can navigate the early rounds she becomes a real contender. The Latvian's career record against Swiatek? An impressive 3-0.

Who else? Simona Halep's coaching tie-up with Patrick Mouratoglou – Serena Williams' former coach of long-standing – has raised eyebrows and now it might be time for it to raise her results level too. Halep has won in Paris before, in 2018, so don't count her out.

Aryna Sabalenka, Sakkari, Paula Badosa. Such players come into the mix if Swiatek slips up, but there has been scant sign of that happening.

World number one Iga Swiatek beat Victoria Azarenka 6-4 6-1 to progress to the quarter-finals of the Internazionali d'Italia in Rome on Thursday. 

Swiatek, who became the first female player to win 25 consecutive matches since Serena Williams in 2015, will face Bianca Andreescu in the last eight after she eased past Petra Martic 6-4 6-4.

"I didn't start well, and everybody could see that," Swiatek told reporters. "I'm really happy with the way I reacted and how I improved in the first set.

"Also how different the second set looked to the first one because I could really reset and really change the way I played. That's the most positive thing for me."

There was a shock in the final game of the day, though, as Daria Kasatkina dumped out number two seed Paula Badosa 6-4 6-4. 

Third seed Aryna Sabalenka sealed a third straight win over Jessica Pegula, easing to a 6-1 6-4 victory, while fourth seed Maria Sakkari defeated Coco Gauff 6-4 7-5.

Seventh seed Danielle Collins was knocked out by unseeded compatriot Amanda Anisimova, the 20-year-old cruising past the Australian Open finalist 6-2 6-2.

There were also victories for Jil Teichmann, who overcame Elena Rybakina 6-7 (3-7) 6-3 7-5, and ninth seed Ons Jabeur, who beat Yulia Putintseva 6-3 6-2.

Emma Raducanu retired from her first-round match with Bianca Andreescu at the Internazionali d'Italia because of a lower back injury.

The world number 12 was trailing 6-2 2-1 when calling time on the match against Andreescu in a highly anticipated showdown between two of the past three US Open winners.

Raducanu initially left the court for treatment ahead of the seventh game of the opening set for a medical timeout and completed just four more games.

Speaking after her withdrawal, coming two weeks before the French Open, Raducanu explained she did not want to aggravate an injury sustained at last week's Madrid Open.

"I thought maybe taking one, two days off, it would go away because a lot of the other small niggles I've had, they've kind of gone away after taking, like, two days off," she said.

"Then I got here and I was training, but it just didn't seem to get better. I was training with some limitations. I wasn't moving really.

"I was just playing where I knew where the ball was coming, just staying in one corner. I think I must have underestimated the unpredictability of competition in a match.

"The last few weeks have been really positive. I've learned a lot about myself and my game has definitely improved on this surface but I need to make sure my back is fully right.

"I need to just keep on it. I don't want to play my next match with a feeling of limitation because I think that I learned my lesson from this week, when to push, when not to push." 

Ons Jabeur joined Andreescu in the last 32 with a 6-0 7-6 (7-1) victory over Sorana Cirstea to keep her impressive run of form going.

The Tunisian won her first WTA 1000 title in Madrid last week and has now won seven successive main draw matches for the first time in her career

Elsewhere in Tuesday's action, American qualifier Lauren Davis pulled off a shock 6-2 6-3 win against number 11 seed Jelena Ostapenko.

Fellow Americans Jessica Pegula, Madison Brengle and Amanda Anisimova also advanced, beating Liudmila Samsonova, Marta Kostyuk and Tereza Martincova respectively.

Anisimova, who is now the player with the most wins in three sets so far in 2022 with nine, will face Belinda Bencic for a place in the last 16.

Emma Raducanu is "managing" a back problem ahead of her first-round Internazionali d'Italia clash with Bianca Andreescu.

The reigning US Open champion exited the Madrid Open at the last-16 stage, going down in three sets to Anhelina Kalinina after struggling with an injury which she admitted had been "taking its toll".

Raducanu said in the aftermath of that 6-2 2-6 6-4 defeat that she would only have given herself a "five per cent chance" of advancing after suffering the injury, and expressed doubt over her ability to compete in Rome.

However, the 19-year-old now insists she will be able to cope on the clay in Italy, saying she needs to adapt to the intensity of top-level matches after suffering from several injury problems this year.

"I think it's just coming from a lot of intensity and overload" Raducanu said. "My back, I'm managing it.

"It's fine. But it's just trying to adapt again to the long matches, to the intensity. I think that all of the small sort of niggles I'm getting, they're all related and connected to each other, when something is overcompensating perhaps."

Raducanu's first assignment in Rome will see her face Canadian Andreescu, who also won the US Open as a teenager when she shocked Serena Williams with a straight-sets final victory in 2019.

That contest will mark the first head-to-head meeting between the two players, and Raducanu was looking forward to facing the former world number four as she highlighted the contrast between conditions in Rome and Madrid.

"Of course, we are both pretty good players," Raducanu said. "It's going to be a good match-up. She's a great athlete and obviously a champion. She's got a really good attitude. I think it's going to be interesting.

"I think here is completely opposite [to Madrid]. It's quite heavy and slow, so there's going to be a lot longer points. It will be interesting to see what the differences are. But I can already feel them on the court tennis-wise."

Emma Raducanu became the third successive major winner to lose to Anhelina Kalinina as the Ukrainian reached her maiden WTA 1000 quarter-final at the Madrid Open.

Ninth-seed Raducanu was the biggest name in action on Tuesday and had been hoping to rack up three successive WTA Tour victories for the first time since her incredible US Open success in September last year.

But Kalinina, who saw off Sloane Stephens and Garbine Muguruza in her two previous matches, got the better of the Brit in an entertaining 6-2 2-6 6-4 win.

Raducanu had not dropped a set in either of her first two outings in Madrid but Kalinina quickly put an end to that.

While the teenager responded well in the second, getting an important break to make it 3-1, Kalinina rallied again in what was a closer deciding set.

The pair traded breaks and then Kalinina got another to set her en route to victory at 5-4 – she had to save one more break point but did ultimately see off Raducanu to book a clash with Jil Teichmann in the last eight.

Teichmann beat Elena Rybakina earlier in the day, dispatching the 16th seed in impressively comfortable fashion as she won 6-3 6-1.

Progression from the last eight for Teichmann will see her reach the semi-final of a WTA 1000 event for the first time.

Sara Sorribes Tormo, the last Spaniard left in the draw, defeated Daria Kasatkina 6-4 1-6 6-3 in something of a rollercoaster ride to line up a quarter-final contest with 12th seed Jessica Pegula.

The American kept her focus despite opponent Bianca Andreescu needing a medical timeout and rain causing a 30-minute halt, eventually winning 7-5 6-1.

Naomi Osaka joined several other big names in falling to a second-round exit at the Madrid Open, although Emma Raducanu cruised to a routine straight-sets win over Marta Kostyuk.

Four-time grand slam winner Osaka crashed to a resounding 6-3 6-1 loss to Spain's Sara Sorribes Tormo, exiting her first tournament on clay since the 2021 French Open, where she withdrew citing mental health issues.

Osaka, who had posted an underwhelming 20-15 record on the surface prior to this week, looked uncomfortable throughout and appeared to struggle with a leg injury during a disappointing second set display.

The 24-year-old was not the only high profile player to be on the receiving end of a shock during a day of drama in the Spanish capital, as several of the competition's seeds failed to secure places in the last 16.

Another home favourite, Garbine Muguruza, fell to a resounding loss of her own as Anhelina Kalinina raced to a 6-3 6-0 victory over the seventh seed, while sixth seed Danielle Collins was thrashed 6-1 6-1 by Canadian Bianca Andreescu.

Fourth seed Maria Sakkari was the highest-ranked player in action, and although the world number five won the first set of her clash with Daria Kasatkina, the Greek eventually fell to a 3-6 6-3 6-1 loss, while 2021 US Open runner-up Leylah Fernandez went down 6-4 6-4 to Jil Teichmann.

One big name who did make comfortable progress, however, was Fernandez's US Open conqueror Raducanu, who eased to a 6-2 6-1 win over Kostyuk to set up a last-16 encounter with another Ukrainian in Kalinina. 

The 19-year-old, who has been quoted as saying she believes clay could prove to be her best surface in the future, was delighted with her victory and enjoying the tournament after dropping just one game in the second set.

"I'm definitely happy with my performance," Raducanu said on court. "Marta's a great opponent - I knew it was going to be a really tough battle. I went out there trying to be really aggressive and it paid off.

"It's my first clay court season and I'm really enjoying it. Madrid is such a cool city and it's got such a great vibe about it. I definitely want to try and stay here for as long as possible."

Naomi Osaka was encouraged by her 2022 clay-court debut, winning her opening match at the Madrid Open against Anastasia Potapova.

The former world number one has not played on the red dirt since the 2021 French Open, where she withdrew citing mental health issues.

Heading into this week in Madrid, Osaka had an underwhelming 20-15 record on clay, with each of her grand slam successes coming on hard courts.

But the 24-year-old has spoken of adjusting her approach and learning from clay king Rafael Nadal – and the early signs were positive.

She needed just over an hour to defeat Potapova 6-3 6-1 on Friday and said: "I'm honestly trying to be more positive with myself.

"This year I came a week early to train on red clay, so I'm just trying to give myself more chances to do better.

Osaka added: "To be able to do it in two sets, for me, it's a really good starting block. 

"I think today for me it was really fun, just being able to be back on the clay and not taking those moments for granted."

Fellow hard-court major champions Emma Raducanu and Bianca Andreescu also won their openers, although the latter required three sets to eventually coast past Alison Riske 6-4 3-6 6-0.

Raducanu will play another 19-year-old in the second round, with the US Open champion paired with Marta Kostyuk after getting over a slightly slow start to thrash Tereza Martincova 7-6 (7-3) 6-0.

Fourth seed Maria Sakkari overcame a scare, meanwhile, ending her losing run at three matches by coming from behind to defeat Madison Keys in three sets.

"Overall, it was a very positive match to get myself back in the winning feeling," the Greek said.

Bianca Andreescu will miss the 2022 Australian Open to focus on her mental health after suffering a "very challenging" couple of years.

Andreescu has struggled with physical and mental concerns since winning the US Open two years ago.

The 21-year-old has felt the strain even more this year, with her grandmother in intensive care after contracting COVID-19, Andreescu also testing positive and spending significant time in isolation.

The former world number four has decided to skip the first grand slam next year as she takes extra time out to "reset, recover and grow", but vowed to return "stronger than ever."

The Canadian tweeted: "As you all know, the past two years have been very challenging for me for a variety of reasons.

"Especially this year in particular, I spent multiple weeks in isolation quarantining which affected me greatly – both mentally and physically. In addition, my grandmother spent several weeks in the ICU due to a covid infection, something that really hit me hard.

"A lot of days, I did not feel like myself, especially while I was training and/or playing matches. I felt like I was carrying the world on my shoulders.

"I could not detach myself from everything that was going on off the court; was feeling the collective sadness and turmoil around it and it took its toll on me.

"I want to give myself extra time to reset, recover and grow from this (as cliche [sic] as that sounds) and continue to inspire by doing charity work, giving back and working on myself because I know by doing this, I will come back stronger than ever.

"I will therefore not start my season in Australia this year, but will take some additional time to reflect, train and be ready for the upcoming 2022 season."

Top seed Karolina Pliskova suffered a shock defeat while defending champion Bianca Andreescu and Coco Gauff also were on the wrong end of upsets Monday at the Indian Wells Open. 

World number 115 Beatriz Haddad Maia of Brazil stunned Pliskova in straight sets to reach the round of 16 at a WTA Premier 1000 event for the first time.

The 15th and 16th seeds, Gauff and Andreescu, also exited in two sets, albeit to seeded players. 

LUCKY LOSER OUSTS PLISKOVA 

Haddad Maia lost in the final round of qualifying but made the main draw as a lucky loser when Nadia Podoroska withdrew through injury, and she has made the most of that reprieve with a 6-3 7-5 defeat of the world number three. 

She had faced Pliskova once before and it did not go well, a 6-1 6-1 rout at the 2018 Australian Open, but the Czech struggled to find her trademark serve amid powerful winds in the California desert.

Pliskova suffered 12 double faults and won just 43.4 per cent of points on her serve, whole Haddad Maia saved nine of the 14 break points she faced on her own serve. 

KONTAVEIT STAYS HOT TO DETHRONE ANDREESCU

Haddad Maia next faces 18th seed Annett Kontaveit, who ousted Andreescu 7-6 (7-5) 6-3 to end the Canadian's dreams of a repeat. 

Kontaveit has won 15 of her last 16 matches, winning titles in Cleveland and Ostrava during that stretch. Monday, she captured the first set on her fifth set point before rallying from a 3-1 deficit in the second to run the table and seal the win.

"It was extremely close throughout the match and I was just trying to stay tough. I was ready for a tough match," Kontaveit said. "She's such a good player, such a great competitor, so I knew it wasn't going to be over until it was really over."

BADOSA BOUNCES GAUFF

Paula Badosa, the 21st seed, breezed past Gauff 6-2 6-2 as the American teen also had trouble with her serve, hitting just two aces after recording 12 in her previous match. 

In a meeting of the last two defeated finalists in the tournament, 10th seed Angelique Kerber beat 20th seed Daria Kasatkina 6-2 1-6 6-4. 

Third seed Barbora Krejcikova handled Amanda Anisimova with ease, 6-2 6-3. 

Ons Jabeur, the 12th seed, had little trouble in downing 22nd seed Danielle Collins 6-1 6-3. 

Garbine Muguruza could not keep the momentum going at the Indian Wells Open after winning a WTA title last week and the former world number one was followed out the door by Maria Sakkari.

Muguruza, who claimed the Chicago Fall Tennis Classic, was surprisingly upstaged 6-3 1-6 6-3 by Australia's Ajla Tomljanovic in an upset on Saturday.

Tomljanovic had been 0-6 against top-10 players this year heading into the match but had just enough to edge the fifth seed and two-time grand slam champion with some timely breaks of serve. 

The world number 47 Tomljanovic is into the third round at Indian Wells for the first time in seven appearances and next faces 26th seed Tamara Zidansek. 

"I was really looking forward to playing Garbine, because I did lose [to her] the last couple of times," Tomljanovic said in her on-court interview. "I did try to focus on that one time I beat her [in 2014], and tried to channel that energy, so I was really happy that I got through today."

GOLUBIC STUNS SAKKARI

Sixth seed Sakkari – a semi-finalist at this year's French and US Opens – also fell victim to a shock result, going out 5-7 6-3 6-2 to Viktorija Golubic in their first meeting. 

The pair kept trading service breaks in the opening set, five in all, before Golubic tightened up her game for the final two sets. 

After breaking the Swiss three times in the first set, Sakkari converted just one of four break points the rest of the match. 

Golubic had lost in the first round in her previous two trips to Indian Wells but is now on to the third, where she will face Anna Kalinskaya.

ANDREESCU HOLDS OFF RISKE

Former US Open champion Bianca Andreescu saw a potential straight-sets win slip away before recovering to defeat Alison Riske 7-6 (7-2) 5-7 6-2.

Andreescu – the defending champion after the 2020 WTA Premier 1000 event was cancelled due to the coronavirus pandemic – led 4-1 in the second set but watched her advantage evaporate as Riske forced a decider, which the Canadian ended up taking comfortably as she faced only one break point in the last. 

Top seed Karolina Pliskova eased past Magdalena Frech 7-5 6-2, while third-seeded Barbora Krejcikova was pushed to a third set before prevailing 6-4 3-6 6-1 against Zarina Diyas. 

Angelique Kerber – the 10th seed and three-time major winner – went the distance to beat Katerina Siniakova 6-1 6-7 (4-7) 7-5, while 15th seed Coco Gauff downed Caroline Garcia 6-3 6-7 (2-7) 6-1 in her debut match at the tournament. 

Ons Jabeur, the 12th seed, prevailed 6-2 6-7 (5-7) 6-3 over Anastasija Sevastova and 18th seed Anett Kontaveit – Andreescu's next opponent – moved on when Martina Trevisan retired down 6-3 5-2. 

Maria Sakkari felt she got her just rewards for being brave as she triumphed in a late-night US Open thriller against Bianca Andreescu.

The Greek sealed a 6-7 (2-7) 7-6 (8-6) 6-3 victory in a gruelling last-16 clash that finally concluded at 02:13 local time in New York – the latest finish to a women's singles match in tournament history.

Sakkari saved eight of the 12 break points she faced as she racked up 46 winners and 40 unforced errors after adopting a bold approach to fight back from a set down and wrap up the victory in three hours and 30 minutes.

She ended 2019 champion Andreescu's 10-match unbeaten streak at the US Open and was delighted to see her tactics pay off, with Karolina Pliskova standing between her and second grand slam semi-final of the year.

Speaking about her fearless showing, Sakkari, who was beaten in the last four at Roland Garros, said: "It's something that I've been working with [coach] Tom [Hill] since end of last year, but I felt like I lost that bravery after the French. I was more hesitant. I was not going for it so much.

"After my loss [in Cincinnati] with Angie [Angelique Kerber] I just practiced for two weeks. I had some very tough practices where I was crying because I could not feel my shots, I could not feel my tennis. But thankfully I had Tom and Yannis, my hitting partner, that supported me a lot.

"I lost my identity. That's how I called it. I lost myself, part of myself. With my psychologist, as well, I found a way to come back and feel again what I felt out there today.

"By telling myself to be more brave, it's not like, Maria, now be brave, and you're brave. It's just a process in practice and everything that has helped me to be more brave.

"I mean, there was a decent crowd staying until 2:30 at night. I said, Maria, you cannot give up. Just stay focused and stay calm and just make balls."

Local hope and reigning champion Bianca Andreescu blew an early lead as she was toppled by Ons Jabeur in the Round of 16 at the National Bank Open in Montreal.

Tunisian 13th seed Jabeur defeated the Canadian second seed 6-7 (5-7) 6-4 6-1 in two hours and 39 minutes on Thursday.

The come-from-behind triumph was the second time in two matches that the Tunisian has rallied from a set down to win after beating Daria Kasatkina in three.

Jabeur had twice been a break up in the opening set before Andreescu claimed it in an tiebreak.

The 26-year-old Tunisian, who made the Wimbledon quarter-finals this year, responded by breaking at 5-4 to win the second set.

After Andreescu had an injury scare after landing awkwardly on her left foot late in the second set, Jabeur dominated the third, finishing by winning eight of the final nine games.

Jabeur finished with 9-3 aces and was more effective on serve, going at an 81.6 win percentage on her first serve (40 from 49 points).

The lower side of the draw has opened up for the Tunisian who will face Jessica Pegula in the quarter-finals after the unseeded American defeated countrywoman Danielle Collins 6-4 3-6 7-5.

Two-time Wimbledon champion and seventh seed Petra Kvitova was knocked out in a shock by Italian Camila Giorgi in straight sets.

Giorgi, ranked 71st in the world, won 6-4 6-4 in one hour and 36 minutes and will face Cori Gauff in the quarter-finals after she had another walkover against Johanna Konta.

Top seed Aryna Sabalenka had no such problems, cruising past Canadian Rebecca Marino 6-1 6-3 inside an hour.

Sabalenka sets up a quarter-final clash with fellow Belarussian and two-time Australian Open winner Victoria Azarenka.

Azarenka got past Greek 11th seed Maria Sakkari in three sets, 6-4 3-6 7-6 (7-2).

Fourth seed Karolina Pliskova got past Amanda Anisimova 6-1 7-6 (10-8) and will play Sara Sorribes Tormo in the last eight after she won in three sets over Katerina Siniakova.

Crowd favourite Bianca Andreescu was made to work as she opened her defence of the National Bank Open title she won two years ago but the Canadian eventually prevailed in Montreal. 

Andreescu defeated Harriet Dart 6-1 3-6 6-3 in just over two hours in her first match since falling to Alize Cornet in the opening around at Wimbledon. 

That was the latest in a disappointing string of results for Andreescu, who also departed Roland Garros after one match, but the world number eight got back on track Tuesday. 

"Playing at home is so, so awesome," Andreescu said in her on-court interview. "You guys [the fans] show me so much love, especially tonight. I've never had this kind of support before, so I'm so, so grateful."

While Andreescu was able to navigate a challenging opener, three other seeded players were not as fortunate. 

Katerina Siniakova downed fifth seed Garbine Muguruza 6-2 0-6 6-3, while Camila Giorgi ousted ninth seed Elise Mertens 6-3 7-5 and Liudmila Samsonova defeated 12th seed Elena Rybakina 6-4 5-7 6-4.

Having a better time of it were seventh-seeded Petra Kvitova, the 2012 tournament champion, and number 10 seed Anastasia Pavlyuchenkova, who won by identical 6-4 6-4 scorelines against Frenchwomen Fiona Ferro and Carolina Garcia, respectively. 

Eighth-seeded Victoria Azarenka waited out a rain delay to cruise past 2013 finalist Sorana Cirstea 6-2 6-2 in the final match of the day. 

In other action, 15th seed Coco Gauff handled Anastasija Sevastova 6-1 6-4 while her countrywoman Danielle Collins continued rolling after her title in San Jose last week, rallying past Jil Teichmann 4-6 6-1 6-3 for her 11th consecutive match win. 

Two more Americans, Sloane Stephens and Jessica Pegula, prevailed in three sets as well. 

Johanna Konta returned to the court after missing Wimbledon and the Tokyo Olympics due to coronavirus-related issues and advanced when Zhang Shuai was forced to retire up 6-4 2-5 with a leg injury.