Playing in only her second singles match of the year, Bouchard blasted a forehand winner to take the first set but Colombian Arango turned the tables in the second set amid a cascade of unforced errors from her opponent.
Third-seeded Jessica Pegula and fourth-seeded Jasmine Paolini of Italy were knocked out during second-round play Wednesday on the grass at the Berlin Open.
The Polish eighth seed walloped Liudmila Samsonova 6-2, 7-5 to reach the Wimbledon semi-finals for the first time.
Naomi Osaka tumbled out of the Berlin Open first round on Tuesday
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.
Images from Monday's Round of 16 women's singles matches at the US Open.
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.
Iga Swiatek was thrilled to see Ted Lasso lead Jason Sudeikis in the stands.
Osaka dropped the first set and trailed 4-2 in the second against the tournament qualifier before finding her rhythm in front of a supportive crowd on a sunny day in South Florida.
Daniil Medvedev jumped for joy in an uncharacteristically emotional celebration after holding off young Frenchman Arthur Fils for a 6-4, 2-6, 7-6(7) win amid gusting winds on centre court in quarter-finals of the BNP Paribas Open, at the Indian Wells Tennis Garden, on Thursday.
Medvedev outlasts Zverev to reach Halle final
IMAGES from the French Open played at Roland Garros, in Paris, France, on Sunday.
Dimitrov was showing signs of fatigue from his three-hour third-round match earlier in the week and could do little to stop the Spanish world number three, who next faces Argentine Francisco Cerundolo.
Poland's world number one Iga Swiatek swatted aside 25th seed Anastasia Pavlyuchenkova 6-4, 6-2 with a near-flawless performance to reach the round of 16 for a fourth straight year at the U.S. Open on Saturday.
Novak Djokovic reached the Wimbledon quarter-finals for the 16th time but it proved a hard day's work at his Centre Court office.
Zheng's win improved her record at the Pan Pacific Open to 8-1, with the 22-year-old having lost in the 2022 final to Liudmila Samsonova in her only previous appearance in the tournament.
Athletes from Russia and Belarus, Moscow's closest ally in the 2022 invasion of Ukraine, are barred from the Paris Games except for the few who will compete as neutral athletes without flags or anthems.
All the action from Day 4 at the Australian Open on Wednesday
Zheng Qinwen saw off a spirited challenge from Diana Shnaider to secure a hard-fought 7-6(5), 6-3 win in their Pan Pacific Open semi-final on Saturday and set up a title clash against American Sofia Kenin.
Laura Siegemund entered the record books with her defeat of fifth-seeded Xiyu Wang of China in four hours, nine minutes at the Thailand Open in Hua Hin on Wednesday.
'The romanticism of late night tennis in New York, it's time to move past that'
Yuan broke Stephens when the American was serving for the match at 6-5. Stephens led 5-4 in the tie-break but could not hold on to her advantage and crashed out.
Third-seeded Jessica Pegula and fifth-seeded Coco Gauff each recorded straight-set wins to advance to the second round of the Rothesay International on Tuesday in Eastbourne, England.
It was an emotional win for Aryna Sabalenka, who missed Wimbledon last month due to a shoulder injury.
Carlos Alcaraz's US Open preparations suffered a setback on Friday as the world number one fell to American Tommy Paul
Medvedev moved a step closer to a potential semi-final showdown with Novak Djokovic at the Australian Open warm-up event.
Still wearing a compression sleeve after a recent forearm issue, Carlos Alcaraz produced a stellar show in a rematch of the duo's 2022 encounter to firmly put himself back in the conversation as the favourite to lift the title in Paris and a third major.
The tournament is the first in five months since the Tour was suspended due to the COVID-19 pandemic and Martic said she felt the effects of not playing competitive tennis for so long.
Gauff survives scare, Osaka advances
Sania Mirza ended her career with first round defeat at WTA Dubai event.
Italian seventh seed Jannik Sinner beat Tommy Paul to set up a Canadian Open final clash with Australia's Alex De Minaur
IMAGES from Day 6 of the 2023 US Open on Saturday.
Murray knocked out by Fritz in Washington
Iga Swiatek's maiden triumph at the US Open extended her lead to almost twice as many points as the second-ranked Ons Jabeur
Badosa beats Fernandez; Swiatek, Halep storm into quarter-finals
Images from Day 5 of the Wimbledon tennis championships played in London, on Friday.
A summary of Sunday's action at the US Open.
A round-up of tennis matches played on Tuesday.