Borussia Dortmund coach Jurgen Klopp has claimed that his side are completely over the slump in form they suffered earlier in the season.
BVB are currently in a rich vein of form, winning their last five games in all competitions, but remain 23 points behind Bayern Munich, who wrapped up the Bundesliga title in record time.
They dropped plenty of points either side of the winter break but Klopp believes his troops are no longer affected by the loss of form after recording an impressive 4-2 win over Mainz.
"What my team did was outstanding," he is quoted as saying by the club's official website.
"Nothing was taken for granted. Everything came together today - even the sun was shining. My team have beaten their inner demons once and for all.
"They started aggressively, playing at a high tempo. We were strong and scored great goals. We might have even got one or two more.
"The game was still tight for a long time. Still, all is well."
Milos Jojic netted the opener for BVB at Signal Iduna Park before Shinji Okazaki equalised. Robert Lewandowski had put his side ahead once more, only for the Japanese forward to net a second, but Lukasz Piszczek and Marco Reus put the match to bed.