Former world number one Victoria Azarenka of Belarus advanced to the quarterfinals as her opponent Darya Kasatkina of Russia retired during the first set with the scores at 6-6.
The decision to declare Gor Mahia the 2019-20 champions in March with nine games of the season left due to the outbreak of the pandemic was upheld by a local tribunal on Tuesday.
The decisive point will be if the reluctant Swiss can set his bunch of youngsters on fire and at the same time close doors at the back.
The big game on Sunday sees Real Madrid make their league debut away to Real Sociedad and it will be interesting to see how Zinedine Zidane's side perform and whether Martin Odegaard, who returns after a successful season on loan in San Sebastian, plays a part in the game.
"We had chances to score in the first half, but we missed all of our good chances," Tuchel said.
Davis secured Dunajska Streda's historic triumph with yet another wonderful goal from the top of the box to stretch the lead to two, setting the final score to 5-3 in the process.
Second seed Karolina Pliskova of the Czech Republic also met little trouble in her 6-4, 6-3 win over Russia's Anna Blinkova.
Ricardo Goulart's volley gave Hebei a 10th minute lead before Guoan midfielder Renato Augusto made it 1-1 with a glorious chip in the 28th minute.
The season for the struggling 2007 German champions VfB Stuttgart might end up in a secure midfield place if the league's youngest side (23.8 years on average) side can catch up with the Bundesliga's quality level. Enditem
"I just wanted to be on top of the leaderboard," Duplantis said. "The 6.15m was really important to me, so I'm happy to get over that."
The Pole spoke about his side's determination to repeat last season's success. "We did something big, but to go on successfully means forgetting about the past," said Poland's captain.