The Wolves were on course for a place in the Champions League at the turn of the year, but back-to-back defeats have seen them slip to sixth, level on points with their guests this weekend and four points away from the top four.
Coach Dieter Hecking is not alarmed by his side's abrupt dip in form, however, and continues to see the glass half full.
"We must not let ourselves be influenced by what is being written or said, but instead we've got to keep an eye on how the team's developing," he said.
"We start from scratch again against Mainz on Saturday with three points up for grabs, and I'm confident that my team will give everything they have got in terms of their attitude to ensure we win our first game of the second half of the season."
Mainz are no pushovers, however, not least since they signed Ja-Cheol Koo from Wolfsburg this winter.
They have won two games with the South Korean in their side, and he is looking to get one over his former team mates on Saturday.
"I don't have any particular feelings about going back there," he told the Bild newspaper.
"I hope, of course, that we bring three points back with us, while it would be nice to score myself."
Indeed, Koo has flourished away from Wolfsburg, where he did not manage a single goal in 32 appearances.
In two loan spells with Augsburg, he scored eight times, but now he has left Wolfsburg permanently behind him, settling in Mainz where "the people are very nice and everything's fantastic for me."
Whether he starts or not, despite scoring in the 2-0 win over Freiburg last week, is only not up to coach Thomas Tuchel.
"It all depends on how he feels," Tuchel said.