Mboko, currently ranked 85th in the world, became the first Canadian to defeat three former Grand Slam champions in a single WTA event in the Open Era, with victories over Sofia Kenin, Coco Gauff and Elena Rybakina.
Earlier, Pegula secured a breezy 6-2, 6-3 victory over the already-eliminated Jasmine Paolini and said she would work out a strategy for her next opponent despite knowing there was a slim chance of an exit if Gauff prevailed in three sets.
'I had a deja vu moment on court. I had match point on the same side of the court, went for the same serve and was telling myself the same things. I had goosebumps, it was really special. It's great to win here again.'
Anna Kalinskaya outclassed Britain's Emma Raducanu at the Washington Open on Saturday to advance to the final, where she will face Leylah Fernandez.
Aryna Sabalenka got the revenge she craved on Friday by defeating Leylah Fernandez to erase the sting of her 2021 US Open semi-final upset.
With two match wins in total in his last four Grand Slams, Tsitsipas has turned to the former coach of Novak Djokovic to turn his fortunes around.
Elena Rybakina powered into her first Cincinnati Open semi-final after stunning defending champion Aryna Sabalenka 6-1, 6-4 on Friday, while five-times Grand Slam champion Carlos Alcaraz recovered from a second-set blip to beat Andrey Rublev.
'We heard it was like the Hollywood of mixed doubles.'
Fifth seed Iga Swiatek stages revival to stay in hunt for 4th French crown.
Emma Raducanu beat four-time Grand Slam champion Naomi Osaka 6-4, 6-2 in their first career meeting to reach the quarter-finals of the Washington Open on Thursday.
Aryna Sabalenka showed nerves of steel and champion's resolve to defeat Elena Rybakina in their Berlin Open quarter-final on Friday, saving four match points in the final-set tiebreak.
World number two Gauff clawed her way back from a set down to defeat Russian Veronika Kudermetova 4-6, 7-5, 6-2 in a match that stretched over two and a half hours.
Goran Ivanisevic gave a scathing assessment of Stefanos Tsitsipas, saying he has "never seen a more unprepared player" in his life.
Alexander Zverev rallied from a set down to beat defending champion Alexei Popyrin in Toronto and move into the semi-finals.
Aryna Sabalenka returns to the US Open as the reigning champion and bookmakers' favourite, but her 2025 season has been anything but smooth sailing.
American lucky loser Reilly Opelka put up an intense battle to stun top seed Daniil Medvedev 7-6(5), 7-6(5) and reach the Libema Open semi-finals in Den Bosch on Friday.
Michelsen, seeded 26th, will face hard-hitting 11th seed Karen Khachanov of Russia, who upset eighth seed Casper Ruud in their fourth round match 6-4, 7-5.
Defending champion Krejcikova edges Dolehide to move into third round at Wimbledon 2025
Third seed Iga Swiatek will play against Italy's Jasmine Paolini in her first Cincinnati Open final.
Shelton blasted an ace on match point to seal the win and avenge his five-set loss to Tiafoe at last year's U.S. Open as the 22-year-old continues to make strides in his breakout season.
Canadian Open champion Shelton was locked in an entertaining contest with Frenchman Adrian Mannarino in the day's opening match on Louis Armstrong Stadium when his tournament suddenly unravelled.
Carlos Alcaraz, who advanced to the last eight in Cincinnati for the third time, has now won 36 of his last 38 matches.
China's Zheng Qinwen beat a struggling Elena Rybakina 7-6(4) 3-6 6-1 in a grueling WTA Finals group stage match on Monday, notching her first career win over the Kazakh in their third meeting.
IMAGES from the French Open played at Roland Garros, in Paris, France, on Sunday.
Naomi Osaka tumbled out of the Berlin Open first round on Tuesday
Russian teenage sensation Mirra Andreeva continued her giant-slaying exploits at the Dubai Tennis Championships by upsetting Kazakhstani sixth seed Elena Rybakina 6-4, 4-6, 6-3 in the semi-finals on Friday.
Rybakina split with Vukov in August, just days ahead of the U.S. Open, before appointing Goran Ivanisevic in November but added her long-time coach back into her team this month.
Maria crowned first Queen's Club women's champion in 52 years
Andreeva bids for Paris glory after stellar start to season
Carlos Alcaraz demolished Mattia Bellucci to banish memories of last year's shock early exit at the US Open on Wednesday.
Nine of the world's top-10 men and nine of the top-10 women have officially entered into the U.S. Open's revamped mixed doubles event, tournament organisers said on Tuesday, with former singles champions Carlos Alcaraz and Emma Raducanu teaming up.
'Great to catch up with a champion tennis player.'
The Croatian helped Djokovic claim nine of his 24 Grand Slam titles before leaving his team in March and on Friday was hired to coach world number five Rybakina for the 2025 season.
On Monday, the Polish eighth seed found her grasscourt wings to fly into the Wimbledon quarter-finals with a soaring 6-4, 6-1 victory over Danish 23rd seed Clara Tauson.
Aryna Sabalenka inched closer to becoming the first woman since Serena Williams (2012-14) to win consecutive US Open titles.
Aryna Sabalenka and Coco Gauff resume their simmering rivalry on the pristine lawns of London.
-German veteran Tatjana Maria defied the odds to move into the biggest final of her career when she stunned second seed and Australian Open champion Madison Keys 6-3, 7-6(3) at the Queen's Club Championships on Saturday.
A ruthless Iga Swiatek slammed the door shut on German lucky loser Eva Lys with a 6-0 6-1 win on Monday to breeze into the quarter-finals of the year's opening Grand Slam for the second time.
Twice champion Iga Swiatek walloped Czech Karolina Muchova in straight sets to reach the Indian Wells quarter-finals on Tuesday.