Bernd Leno said he wasn't happy about the chants from Bayer Leverkusen supporters. Alex Grimm/Bongarts/Getty Images

Bayer Leverkusen keeper Bernd Leno has hit out at fans heaping abusive chants on the team which suffered a 2-0 defeat to Mainz at the weekend.

Leverkusen recorded their 10th loss of the domestic season on Saturday, which came at the heels of their 4-2 home loss to Atletico Madrid in the Champions League round of 16.

The defeat did not damage Leverkusen's chances of at least qualifying for the Europa League next season after both Cologne and Frankfurt lost. Bayer remain eighth in the standings, with Frankfurt and Cologne on six and seven five and three points ahead of them.

However, the atmosphere at the club is currently heated, and on Saturday fans either left the stadium early or called for the sacking of CEO Michael Schade as well as mocking their players with "So ein Tag, so wunderschon wie heute" (A day as beautiful as today) chants.

"The players didn't like it. I am very frustrated," Leno, who conceded twice in the opening 11 minutes of the match, said. "Nobody had fun today."

Addressing those fans leaving the ground early, Leno added: "It's their thing that they go home. But you don't necessarily need those abusive chants. You could see that the players did not like it. You hear it when the fans start singing stuff like that."

Last week, Bayer's ultra groups already broke with the club when they announced they would boycott Leverkusen's home games until further notice.

The turbulence at the club was only increased by a report in Die Zeit late last week, which said that the club appear to be sticking with coach Roger Schmidt for now.

On Thursday, Schmidt told the German weekly that he could very well live without football while his agent Marco de Angelis bemoaned the club's failure to back the coach at the right time.

"I am hugely disappointed by those statements. With full conviction, we have backed the coach in the last three years," CEO Schade told Bild, while sporting director Rudi Voller hoped for a reaction in their next match at Dortmund.

He said: "We need to believe in the turnaround and get up again."