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.
Andy Spalding, an academic and author who studies corruption in sporting "mega-events" such as the Olympics or the football World Cup, believes French authorities are showing they are serious about delivering a clean Games.
A "saddened and disappointed" Manny Pacquiao conceded Monday his Olympic boxing dream was over after the ring great was denied a berth at this year's Paris games.
Argentine superstar Lionel Messi congratulated the Argentina Under-23 team for their win 1-0 win over rivals Brazil to book a spot in this year's Paris Olympics.
Champions in Rio 2016 and the Covid-delayed 2020 Tokyo Games, Brazil only needed a draw against their arch continental rivals on the final day of the South American pre-Olympic tournament in Venezuela.
Podium finishers at the upcoming Paris Olympics will be rewarded with a piece of the Eiffel Tower, organisers said on Thursday, unveiling the event’s medals which are set with hexagon-shaped tokens forged out of scrap metal from the monument.
The International Olympic Committee added that there were currently only eight athletes from Russia and three from Belarus who had qualified as neutral athletes.
Organisers said nearly 70,000 of these newly released tickets would cost 24 euros ($26), the lowest price category of any of the tickets sold for the Games.
Police raided the headquarters of the Paris 2024 Olympics on Tuesday just over a year before the opening ceremony of the quadrennial sporting showpiece.
Phase two of sales got underway on May 11, with nearly 1.5 million individual tickets available, after over three million were sold as multi-event packs during phase one
Mbappe signed a new contract with PSG at the end of last season to keep him at the Qatar-owned club until 2025, although French media reports have indicated that the last year of that deal is optional and down to the player
