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.
The athletes, fresh from a national record 53 Olympic medal trawl, were asked about absent colleague b-girl Rachael "Raygun" Gunn.
Khelif was the centre of a gender controversy at the Olympics on her way to the women's 66kg title.
Jamaica were in third spot after the opening leg, but Andrenette Knight dropped the baton after bumping Ireland's Rhasidat Adeleke on the second leg.
The USA's dream team of NBA superstars held off France 98-87 to take their tally of men's Olympic basketball golds to 17.
China claimed their fifth gold from five competitions at the Games.
In a historic first, the opening ceremony will be held outside the stadium, and the 2024 Olympics will be the first in history to feature an equal number of male and female athletes.
The state-owned railway operator said arsonists had targeted installations along the lines connecting Paris with the country's west, north and east.
France will deploy its largest post-war security operation for today’s opening ceremony.
The absence of Russia only bolsters America's team chances.
Canada coach Priestman, who had removed herself from the game after New Zealand's complaint, watched it from the team hotel.
Nadal, the 2008 singles gold medallist, will pair up with Alcaraz in a tennis dream team at Roland Garros, looking to also add to the doubles title he won with close friend Marc Lopez at Rio in 2016.
“Considering the magnitude of the Paris Olympics, my preparation is not good enough,” Sonia told The Daily Star on the eve of her departure to Paris on July 20.
"I thought my father had never asked for anything and this might be his last request. So I gathered all my strength and agreed."
Otherwise, the marathon swimming event will take place at the reserve site of Vaires-sur-Marne
Archer Sagor Islam, at just 18 years old, has made history as the youngest athlete from his country to earn a direct spot in the Olympic Games, following in the footsteps of golfer Siddiqur Rahman and archer Ruman Sana who achieved the same in previous editions
