The second set was filled with breaks as both players failed to hold their serves from the 6th to the 11th game. Zhang served to win in the 10th game but was broken by her French opponent. However, when the chance appeared again in the 12th, Zhang didn't miss it and wrapped up the victory with a flawless love game.
Tsitsipas was edged by Stan Wawrinka in a marathon over-fiver-hour battle at this stage last year, but this time he took chances with his 24 winners against the No.18 seed.
"They played great and showed their value on the court, which led to our victory," Li commented.
After both exchanged serves in the following two games, the former world No. 23 then delivered a dominant performance in the tie break to seal the first set.
The fixture between Genoa and Torino was postponed as many of Genoa's players tested positive for COVID-19. Enditem
Meanwhile Barca loaned 20-year-old left back Joan Miranda to Betis, while Rafinha Alcantara was sold to Paris Saint Germain for a bargain three million euros and central defender Jean-Clair Todibo (who is not in Koeman's plans) was loaned to Benfica on a two-year deal.
Han Ziqi contributed a game-high 23 points, but her solo effort could not save Tianjin from a big loss.
Michail Antonio, Pablo Fornals and Jared Bowen scored West Ham's goals in the 14th, 34th and 84th minute of the game.
AC Milan continued its good forms as the Rossoneri beat Spezia 3-0, including a Rafael Leao brace.
Elsewhere, Athletic Club were linked with a late return of former striker Fernando Llorente only for the deal to fall through, while Valencia coach Javi Gracia is rumored to be considering resigning after a summer which saw the departure of players such as Dani Parejo, Ezequiel Garay and Rodrigo Moreno without any new arrivals to strengthen a squad which failed to qualify for Europe last season.
Elsewhere Villarreal's Gerard Moreno retains his place in the squad after an excellent start to the season, as does FC Barcelona's Ansu Fati, who scored in the 4-0 defeat against the Ukraine a month ago. Meanwhile Mikel Oyarzabal is also recalled after he too had to drop out in September after testing positive for COVID-19.