Elsewhere, Sassuolo registered another comprehensive victory as it beat Crotone 4-1 with Francesco Caputo's brace.
The annual carnival, also featuring jet-skiing and kayaking, was held to celebrate the Mid-Autumn Festival and Chinese National Day holiday. 300 local swimmers attend the competition to swim across the Liujiang River on Friday.
United had a dream start when Bruno Fernandes scored a second minute penalty, but soon dropped behind as Tanguy Ndombele and then Son Heung-min netted for Spurs.
Also missing were injured Galatasaray goalkeeper Fernando Muslera and Atletico Madrid defender Jose Gimenez, who contracted the coronavirus.
Real Madrid's 2-0 win away at Levante takes them into the international break as league leaders, but you would be wrong to think all was plain sailing for Zinedine Zidane's side.
The Kyodo news agency said that despite the mass infections, the club's Pacific League game against the Orix Buffaloes went ahead as planned on Tuesday. The Chiba side lost 3-0 at home.
"We are a new group. I want to help the team get into a rhythm as soon as possible to prepare for tougher matches ahead," Li noted.
Napoli was banned from traveling by local health authorities, after Piotr Zielinski and Eljif Elmas tested positive for COVID-19.
Nadal will face Sebastian Korda, the son of 1998 Australian Open winner Petr Korda, in the next round. The American youngster secured his first appearance in a Grand Slam round of 16 by beating fellow qualifier Pedro Martinez 6-4, 6-3, 6-1 to advance.
Mikel Oyarzabal's penalty after a slightly harsh handball decision opened the scoring in the 29th minute and Real Sociedad had the game completely under control before goals from Mikel Merino and Portu in the 78th and 81st minutes assured the three points.
After leading 65-61, Shanxi rode on a 10-3 surge midway through the last quarter and withstood Hebei's comeback afterwards.