Paris 2024 sold a record 12 million tickets for the Olympics and Paralympics, beating the Games record previously set by London 2012, organisers said on Sunday.
Palfrey's comments triggered a fierce reaction from team officials and the Australian Olympic Committee.
Lin clinched gold in the women's boxing final match on Sunday, an emotional win that came as she and Algerian boxer Imane Khelif have been embroiled in a major row over their gender eligibility.
Tennis was introduced to China in the 1860s, but it failed to gain mass appeal and was largely an elite sport reserved for the wealthiest families.
The Australian Olympic Committee has decried a "misleading and bullying" online petition that described Gunn's performance as "unethical" and questioned how she was chosen for Paris.
Indian wrestler Vinesh Phogat on Thursday lost her appeal to the Court of Arbitration for Sport (CAS) after her disqualification from the women's 50kg final at the Paris Olympics for being overweight.
The athletes, fresh from a national record 53 Olympic medal trawl, were asked about absent colleague b-girl Rachael "Raygun" Gunn.
Australia's Olympic team, including gold medallists Jessica Fox, Kaylee McKeown and Ariarne Titmus, arrived back in Sydney on Wednesday to a rapturous welcome from friends, family and Prime Minister Anthony Albanese.
Two-time world champion Shericka Jackson withdrew from heats for the Olympic 200m on Sunday in another hammer blow for the Jamaican team.
Germany will face the United States in the semi-finals of the Olympic women's football tournament, while Spain will take on Brazil after a frenetic day of quarter-final action marked by late goals and plenty of shootout drama on Saturday.
"I feel honoured just to be an ambassador for my country," Alfred told reporters. "Not many people know about Saint Lucia. Sometimes I can be in an Uber and they ask me where I'm from... and they'll be like 'Where's Saint Lucia?'"
Novak Djokovic takes on Carlos Alcaraz at Roland Garros in a blockbuster men's singles tennis final, while Xander Schauffele will be hunting for back-to-back gold medals at the Le Golf National course.
The 17-year-old swimmer did it in an Olympic record time of two minutes 06.56 seconds, taking down the 2016 record of 2:06.58 set by Hungary's Katinka Hosszu, to complete a medley double after winning the 400 last Monday.
American superstar Katie Ledecky powered to a fourth straight 800m freestyle title on Saturday to claim a ninth career Olympic gold, equalling the most ever won by a woman athlete in any sport.
Bangladesh's 11th campaign in the Summer Olympic Games finished yesterday as disappointingly, if not more, as the country's previous 10 campaigns.
Saint Lucia's Julien Alfred stunned US favourite Sha'Carri Richardson to win the Olympic women's 100m gold medal on Saturday, etching her name into history to claim the Caribbean nation's first ever medal at the Games.
Zheng Qinwen became the first Chinese player to win Olympic tennis singles gold when she defeated Croatia's Donna Vekic on Saturday, hailing her victory as a "proud" moment for herself and her country.
Simone Biles soared to women's vault gold on Saturday, her gravity-defying Yurchenko double pike propelling her to a third triumph of the Paris Games and her seventh career Olympic crown.