Top seed Angelique Kerber was knocked out of the last-16 of Wimbledon by Garbine Muguruza on Monday, ensuring she will lose her world number one ranking.
Images from the third day at the US Open, the final Grand Slam tournament of the year, in New York, on Wednesday:
The unseeded Ostapenko, 20, downed Romanian third seed Simona Halep 4-6, 6-4, 6-3 in the final, hitting a staggering 54 winners and taking her tournament tally to 299.
Defending champions Leander Paes and Radek Stepanek had to work hard to cross the first round hurdle in the men's doubles even as Sania Mirza advanced in both the mixed and doubles events at the US Open.
Eleven-times champion Rafael Nadal booked his place in the semi-finals of the Barcelona Open semi-finals by beating German Jan-Lennard Struff 7-5, 7-5 in a hard-fought match on Friday.
Nadal faced no break points in a ruthless display to set up a meeting with Canadian Denis Shapovalov.
Venus Williams beat top seed Angelique Kerber on Wednesday to advance to a Miami Open semi-final against Britain's Johanna Konta.
At one stage Yuki was a break up, serving for the opening set but lost his serve and eventually the set. After drawing parity, Yuki twice lost his serve to fall behind 0-3 in the decisive set and never recovered.
Images from Day 7 at the US Open.
Spain's Garbine Muguruza reached her second Wimbledon final in three years with a thumping 6-1, 6-1 win over Slovakia's Magdalena Rybarikova.
Images from Day 1 of the Wimbledon Championships.
Serena Williams moved another step closer to a record-tying 24th career Grand Slam title with a comfortable 6-3, 6-2 victory over Czech Karolina Muchova on Friday to reach the last 16 at the US Open.
Russia's Elena Vesnina ousted German second seed Angelique Kerber 6-3, 6-3 to reach the quarter-finals of the BNP Paribas Open at Indian Wells, California on Tuesday.
A clinical Roger Federer took a confident step towards a fourth Miami Open title on Wednesday, easing past 13th-seeded Russian Daniil Medvedev 6-4, 6-2 to book a spot in the quarter-finals.
The women's draw at the US Open has been in news for the upsets it created. Almost everyday one or some days even two of the top seeds feel to unknown players.
Mirjana Lucic-Baroni offered no excuses for her meek departure from the Australian Open semi-finals at the hands of Serena Williams on Thursday, keener to discuss the career-high ranking that will follow her stunning run at Melbourne Park.
Newly-crowned world number one Angelique Kerber has nothing left to prove after clinching the U.S. Open for a second grand slam this year and securing a place in the record books, the German said on Tuesday. The 28-year-old became the oldest player to rise to that rank when the new list was published on Monday, capping a memorable summer that also included the Olympic silver medal at the Rio de Janeiro Olympics and a Wimbledon final appearance.
Maria Sharapova's claycourt season got off to a poor start on Tuesday as she lost in three sets to Caroline Garcia in the first round of the Porsche Tennis Grand Prix in Stuttgart.
Melbourne man McNamara won five singles titles and 19 in doubles and teamed up with compatriot Paul McNamee to win the Australian Open doubles in 1979 and Wimbledon twice in 1980 and 1982.
Svetlana Kuznetsova opened the defence of her Sydney International title with a comfortable 6-1, 6-4 victory over Irina-Camelia Begu on Sunday as the Australian Open warm-up event suffered a pair of big-name withdrawals.
World No 2 Serena Williams shook out any cobwebs from four months away from tennis with a 6-3, 6-4 victory over France's Pauline Parmentier in the first round of the Auckland Classic on Tuesday.
'I challenge people just do it for a month to see how you feel, okay?'
Halep became the first Romanian to reach the summit of the women's rankings when she beat French Open champion Jelena Ostapenko in the semi-finals of the China Open in Beijing, a feat she feels is the high point of her career to date.
Rafael Nadal gave a much improved performance to advance into the quarter-finals of the Barcelona Open on Thursday, dispatching Spanish compatriot and crowd favourite David Ferrer 6-3, 6-3.
Images from matches played on Day 4 at the US Open at the Flushing Meadows in New York on Thursday.
The 30-year-old is the first German woman to win Wimbledon since Steffi Graf in 1996.
The 23-year-old Wimbledon champion, who climbed to the top of the WTA rankings on Monday, hardly broke sweat against the Frenchwoman, ranked 20th in the world, on her way to victory in an hour and 20 minutes.
The top women's seeds continued to be scattered at Wimbledon on Wednesday, with Caroline Wozniacki's exit meaning five of the top eight were gone before the end of the third day.
Borna Coric ended Roger Federer's 20-match winning streak on grass, beating him 7-6(6), 3-6, 6-2 in the Halle Open final on Sunday while also bringing to a halt the Swiss maestro's reign as World No 1.
He will skip the two Masters series events in Shanghai and Paris next month.
Not just because Serena Williams looks capable of landing a 24th Grand Slam title against all the odds having returned from maternity leave and Maria Sharapova is seeking redemption after a 15-month doping ban with a third French Open title.
Ana Konjuh was not a year old when Serena Williams played her first US Open match but both will be in the Arthur Ashe Stadium spotlight on Wednesday, with four gripping quarter-finals to take centre stage at the year's final Grand Slam.
Ana Konjuh has opened some eyes at Flushing Meadows as the 18-year-old former world number one junior emerged to reach her first Grand Slam quarter-final at the US Open.
Venus Williams moved within two wins of a possible sisterly showdown with Serena in the semi-finals of the US Open by beating German 26th seed Laura Siegemund to reach the fourth round on Saturday.
World number one Rafael Nadal recorded his 20th straight win on clay as he began his quest for a sixth title in Madrid, defeating Frenchman Gael Monfils 6-3, 6-1.
Daniil Medvedev and Karen Khachanov crushed second seed Dominic Thiem and third seed Alexander Zverev respectively to set up an all-Russian semi-final at the Rogers Cup in Montreal on Friday.
Serena Williams and Naomi Osaka advanced to the Rogers Cup quarter-finals on Thursday to set up their first meeting since the American's infamous row with an umpire overshadowed last year's US Open final.
Big-serving Isner reaches Montreal second round
'Maybe the last tournament changed something in people's minds but not in mine. I'm really enjoying every match but, still, I think I do have lot of things to improve'
The 20-year-old, looking to become the first unseeded woman to lift the Suzanne Lenglen Cup since 1933, blazed her way to the final, hitting winners and errors with reckless abandon.
