Matthaeus encouraged Schalke not to give up as 31 rounds of matches still remain.
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.
He called the latest defeats of Liverpool (7-2) and Manchester United (6-1), aside from Bayern Munich's loss against Hoffenheim (4-1), the forerunners.
The 17-year-old assist-giver remained in the thick of things as Reyna's through ball met Haaland, who drilled his brace from the edge of the box into the top left corner with 66 minutes played.
For Shao Ting, another national player changing her club during the off-season, the league's organizer has done an excellent job in terms of anti-virus measures.
Han Ziqi contributed a game-high 23 points, but her solo effort could not save Tianjin from a big loss.
As opposed to early sluggishness last game, Xinjiang heated quickly into the game with a 10-0 surge on Shanghai's consecutive turnovers, before Bao Meng's jumper snapped Shanghai's scoring drought over six minutes. Xinjiang set up a 10-point cushion as the first quarter ran out.
Her amazing shooting performance was highlighted by six 3-pointers from nine attempts, and her teammate Wang Haimei got 13 points. Shen Yi got a team-high 13 points for Dongguan and Hu Ke added 10.
Thanks to the third-round win, Wuhan moved atop the championship group standings with six points.
"To stand in his way would not be just reward for the service he has given us, and we wish him the best."
Wuhan had the upper hand for most of a back-and-forth second half, heading into the final frame with a three-point margin, but had to watch as their lead slipped away.