National team manager Oliver Bierhoff said the association depends on internationals' turnovers and will start a charm offensive to regain fans' trust.
Union gained momentum but missed the chance to extend the lead at the half-hour mark after Nico Schlotterbeck pulled wide from tight angle.
"It's funny. Both of us had a tough week in Hambug, tough final. Then both of us was down in the first round with two sets to love. Both of us come back. Now we are here and we're going to play each other in quarters. It's like a nice press story of the match," Rublev said about his quarterfinals match against Tsitsipas.
Luo Xinyu bagged 18 points for Jiangsu, who also got 14 points apiece from Xu Chenyan and Jiang Jiayin.
Elsewhere, Sassuolo registered another comprehensive victory as it beat Crotone 4-1 with Francesco Caputo's brace.
Real Madrid won 2-0 away at Levante in a game played in Villarreal's El Madrigal Stadium thanks to an excellent first half goal from Vinicius Jr, who curled his shot in at the far post, an injury time goal from Karim Benzema and a series of important saves from Thibaut Courtois, who frustrated the home side with five second half saves to send his side top of the table.
Raheem Sterling opened the scoring for the visitors in the 17th minute, but Rodrigo Moreno's first goal for Leeds in the 59th minute, following an error from City keeper Ederson, gave his side a point they more than deserved.
Esteban Burgos scored from the penalty spot for Eibar after 28 minutes, only for Toni Villa to equalize for the home team eight minutes later. Marco Dmitrovic then saved a penalty, and even though Pape Diop was sent off for the second time this season with 18 minutes remaining, before Rodrigues' later header gave Eibar three vital points in injury time.
Eibar won for the first time this season as Kevin Rodrigues' 91st minute goal gave it a 2-1 triumph away at Valladolid in a frantic game on Saturday.
An excellent team performance from West Ham saw them rewarded with a surprise 3-0 win away over Leicester City, who had demolished Manchester City 5-2 a week ago.
Fueled by Wei's six points in a row, Inner Mongolia widened the gap back to seven points, and they used a 22-13 second quarter to build a 13-point advantage at halftime.