The Australian won a tour-leading five titles this year including her second Grand Slam.
The Serbian 24-times Grand Slam champion trailed Korda 5-2 in the second set but broke the American as he served at 5-3 and his precise and powerful serving carried him to the finish.
The top-seeded duo battled past the Rodionova sisters of Australia, Anastasia and Arina, 6-7, 6-3, 10-5 in their opening round match of the US $731,000 clay-court event.
Canada's Eugenie Bouchard, on a comeback trail from injury, began her campaign in the tournament with a 7-5. 6-2 win over Joanne Zuger of Switzerland. She was joined in the second round by compatriot and seventh-seed Rebecca Marino.
Madison Keys was dumped out of the Miami Open third round on Sunday, falling 6-4, 6-2 to Philippine wild card Alexandra Eala
Sania Mirza quelled a late challenge from world number 49 and 11th seed Anne Keothavong to sail into the pre-quarter-finals of the US $220,000 WTA Aegon Classic in Birmingham on Wednesday. The unseeded Indian beat the British No 1 6-1, 7-6(5) in the second round after battling it out for one hour and 27 minutes.
Wimbledon champion Serena Williams advanced to the Stanford Classic final after she crushed Sorana Cirstea 6-1, 6-2 on Saturday and will meet fellow American Coco Vandeweghe who made her first WTA final after she overpowered Yanina Wickmayer 6-2, 3-6, 6-2.
Former world number one Maria Sharapova eased past defending champion Peng Shuai 6-3, 6-1 at the Tianjin Open on Saturday to reach her first WTA final in almost two and a half years.
Iga Swiatek has been not been at her world-beating best in the months leading up to the U.S. Open but the Pole has both the talent and mentality to lift her game for the final Grand Slam of the year, tennis great Chris Evert said.
India's tennis ace Sania Mirza and Cara Black showed nerves of steel as they saved three match points in the Super Tie Break against Kveta Peschke and Katarina Srebotnik to cruise into the summit clash of the WTA year-end finals, in Singapore on Saturday.
World number one Carlos Alcaraz retired injured against Holger Rune at the Paris Masters on Friday, sending his fellow 19-year-old through to the semi-finals, while Novak Djokovic and Felix Auger-Aliassime also sealed places in the last four.
Doha will host the 2008-2010 WTA Tour season-ending championships, the most prestigious event on the women's tennis circuit.
Chinese tennis star Peng Shuai, whose whereabouts have been a matter of international concern for weeks, attended a tennis tournament in Beijing on Sunday.
18-year-old Russian Olga Poutchkova clinched her maiden WTA final appearance beating Uzbek qualifier Iroda Tulyaganova.
Roger Federer called for a merger between the two governing bodies last month, with both Simon and ATP Tour Chairman Andrea Gaudenzi welcoming the suggestion. But some top WTA players have said they want an equal standing for the women players in a combined body.
World number one Carlos Alcaraz faces a potential quarter-final clash with old foe Jannik Sinner in his US Open title defence, and American Coco Gauff is on a collision course with defending champion Iga Swiatek on the women's side.
The second set saw Fruhvirtova dominate her opponent, a former Grand Slam singles semi-finalist. After a marathon opening set lasting 77 minutes, the teenager clinched it 6-2 in quick time.
Ferro, who will be remembered for winning the first official tournament on tennis' return amid the pandemic, will now climb to World No 44 in the WTA rankings on Monday.
India's Sania Mirza beat Alexa Glatch 6-4, 6-4 to enter the final at Forest Hills Women's Tennis Classic in New York
Wimbledon organisers have 'zero appetite' to turn the Championships into a 15-day event
Britain's Johanna Konta withstood a fightback by Madison Keys and third seed Agnieszka Radwanska beat Ukraine's Elina Svitolina on Saturday to reach to the China Open final.
Simona Halep announced her retirement from professional tennis on Tuesday after losing in the first round at her home event in Cluj.
The women's Grand Slams were all won by different players for a fifth straight year in 2021
Sania Mirza and Rohan Bopanna outclassed Desirae Krawczyk and Neal Skupski to enter the mixed doubles final at the 2023 Australian Open.
The Dutchman collapsed on the court after converting his sixth match-point to end an absorbing three hour, seven minute affair under sunny skies on Stadium One court.
Andy Murray recovered from a slow start to beat Argentine qualifier Juan Ignacio Londero
The restart has divided opinion among the players, with some 200,000 new COVID-19 cases being reported globally every day and international travel restrictions still in place.
Tennis great Serena Williams is recovering from surgery to remove a large cyst on her neck.
Making a comeback after a two-year hiatus, she enters women's doubles quarter-finals of Hobart International.
Djokovic saved three breakpoints in stifling conditions to go 5-4 up but lost the opening set in a tough tiebreak as Opelka cranked up his serve
Indian tennis ace Sania Mirza and her Swiss partner Martina Hingis lifted their ninth title together this year beating the Spanish pair of Garbine Muguruza and Carla Suarez Navarro to clinch the WTA Finals women's doubles trophy, in Singapore, on Sunday.
American tennis ace Serena Williams has maintained her No 1 spot, while German Angelique Kerber has slipped to the third in the latest women's tennis world rankings issued by the WTA.
The World No 1 becomes earliest qualifier for WTA Finals
A summary of sports events and persons who made news on Saturday
Britain's Johanna Konta will become the first British woman to reach the top 10 of the WTA rankings for 32 years on Monday after reaching the China Open final on Saturday.
Naomi Osaka has parted ways with coach Wim Fissette after four years together across two stints, the 26-year-old announced late on Friday.
The first set was over in 31 minutes with the No. 4 seed making the most of a weak Raina serve while saving two break points on her own serve.
The 27-year-old Romanian beat Sloane Stephens at Roland Garros to win her maiden Grand Slam title in June and will have spent 40 weeks at the top of the rankings by the end of the season.
* Swiatek started playing tennis in an attempt to emulate her older sister, who competed briefly on the junior circuit.
"Unfortunately I am no longer able to train and play the way I used to, and recently my body can't live up to my expectations," Radwanska, 29, said in a post on Facebook.
